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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2002.05669">arXiv:2002.05669</a> <span> [<a href="https://arxiv.org/pdf/2002.05669">pdf</a>, <a href="https://arxiv.org/format/2002.05669">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevApplied.14.014030">10.1103/PhysRevApplied.14.014030 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Optical suppression of tilt-to-length coupling in the LISA long-arm interferometer </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chwalla%2C+M">M Chwalla</a>, <a href="/search/physics?searchtype=author&query=Danzmann%2C+K">K Danzmann</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+M+D">M Dovale 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Delgado%2C+J+J+E">J J Esteban Delgado</a>, <a href="/search/physics?searchtype=author&query=Barranco%2C+G+F">G Fern谩ndez Barranco</a>, <a href="/search/physics?searchtype=author&query=Fitzsimons%2C+E">E Fitzsimons</a>, <a href="/search/physics?searchtype=author&query=Gerberding%2C+O">O Gerberding</a>, <a href="/search/physics?searchtype=author&query=Heinzel%2C+G">G Heinzel</a>, <a href="/search/physics?searchtype=author&query=Killow%2C+C+J">C J Killow</a>, <a href="/search/physics?searchtype=author&query=Lieser%2C+M">M Lieser</a>, <a href="/search/physics?searchtype=author&query=Perreur-Lloyd%2C+M">M Perreur-Lloyd</a>, <a href="/search/physics?searchtype=author&query=Robertson%2C+D+I">D I Robertson</a>, <a href="/search/physics?searchtype=author&query=Rohr%2C+J+M">J M Rohr</a>, <a href="/search/physics?searchtype=author&query=Schuster%2C+S">S Schuster</a>, <a href="/search/physics?searchtype=author&query=Schwarze%2C+T+S">T S Schwarze</a>, <a href="/search/physics?searchtype=author&query=Tr%C3%B6bs%2C+M">M Tr枚bs</a>, <a href="/search/physics?searchtype=author&query=Wanner%2C+G">G Wanner</a>, <a href="/search/physics?searchtype=author&query=Ward%2C+H">H Ward</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2002.05669v2-abstract-short" style="display: inline;"> The arm length and the isolation in space enable LISA to probe for signals unattainable on ground, opening a window to the sub-Hz gravitational-wave universe. The coupling of unavoidable angular spacecraft jitter into the longitudinal displacement measurement, an effect known as tilt-to-length (TTL) coupling, is critical for realizing the required sensitivity of picometer$/\sqrt{\rm{Hz}}$. An ultr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.05669v2-abstract-full').style.display = 'inline'; document.getElementById('2002.05669v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.05669v2-abstract-full" style="display: none;"> The arm length and the isolation in space enable LISA to probe for signals unattainable on ground, opening a window to the sub-Hz gravitational-wave universe. The coupling of unavoidable angular spacecraft jitter into the longitudinal displacement measurement, an effect known as tilt-to-length (TTL) coupling, is critical for realizing the required sensitivity of picometer$/\sqrt{\rm{Hz}}$. An ultra-stable interferometer testbed has been developed in order to investigate this issue and validate mitigation strategies in a setup representative of LISA, and in this paper it is operated in the long-arm interferometer configuration. The testbed is fitted with a flat-top beam generator to simulate the beam received by a LISA spacecraft. We demonstrate a reduction of TTL coupling between this flat-top beam and a Gaussian reference beam via introducing two- and four-lens imaging systems. TTL coupling factors below $\pm 25\,渭$m/rad for beam tilts within $\pm 300\,渭$rad are obtained by careful optimization of the system. Moreover we show that the additional TTL coupling due to lateral alignment errors of elements of the imaging system can be compensated by introducing lateral shifts of the detector, and vice versa. These findings help validate the suitability of this noise-reduction technique for the LISA long-arm interferometer. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.05669v2-abstract-full').style.display = 'none'; document.getElementById('2002.05669v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Applied 14, 014030 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1711.10320">arXiv:1711.10320</a> <span> [<a href="https://arxiv.org/pdf/1711.10320">pdf</a>, <a href="https://arxiv.org/ps/1711.10320">ps</a>, <a href="https://arxiv.org/format/1711.10320">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6382/aab86c">10.1088/1361-6382/aab86c <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Reducing tilt-to-length coupling for the LISA test mass interferometer </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tr%C3%B6bs%2C+M">M Tr枚bs</a>, <a href="/search/physics?searchtype=author&query=Schuster%2C+S">S Schuster</a>, <a href="/search/physics?searchtype=author&query=Lieser%2C+M">M Lieser</a>, <a href="/search/physics?searchtype=author&query=Zwetz%2C+M">M Zwetz</a>, <a href="/search/physics?searchtype=author&query=Chwalla%2C+M">M Chwalla</a>, <a href="/search/physics?searchtype=author&query=Danzmann%2C+K">K Danzmann</a>, <a href="/search/physics?searchtype=author&query=Barranco%2C+G+F">G Fernandez Barranco</a>, <a href="/search/physics?searchtype=author&query=Fitzsimons%2C+E+D">E D Fitzsimons</a>, <a href="/search/physics?searchtype=author&query=Gerberding%2C+O">O Gerberding</a>, <a href="/search/physics?searchtype=author&query=Heinzel%2C+G">G Heinzel</a>, <a href="/search/physics?searchtype=author&query=Killow%2C+C+J">C J Killow</a>, <a href="/search/physics?searchtype=author&query=Perreur-Lloyd%2C+M">M Perreur-Lloyd</a>, <a href="/search/physics?searchtype=author&query=Robertson%2C+D+I">D I Robertson</a>, <a href="/search/physics?searchtype=author&query=Schwarze%2C+T+S">T S Schwarze</a>, <a href="/search/physics?searchtype=author&query=Wanner%2C+G">G Wanner</a>, <a href="/search/physics?searchtype=author&query=Ward%2C+H">H Ward</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1711.10320v1-abstract-short" style="display: inline;"> Objects sensed by laser interferometers are usually not stable in position or orientation. This angular instability can lead to a coupling of angular tilt to apparent longitudinal displacement -- tilt-to-length coupling (TTL). In LISA this is a potential noise source for both the test mass interferometer and the long-arm interferometer. We have experimentally investigated TTL coupling in a setup r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.10320v1-abstract-full').style.display = 'inline'; document.getElementById('1711.10320v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1711.10320v1-abstract-full" style="display: none;"> Objects sensed by laser interferometers are usually not stable in position or orientation. This angular instability can lead to a coupling of angular tilt to apparent longitudinal displacement -- tilt-to-length coupling (TTL). In LISA this is a potential noise source for both the test mass interferometer and the long-arm interferometer. We have experimentally investigated TTL coupling in a setup representative for the LISA test mass interferometer and used this system to characterise two different imaging systems (a two-lens design and a four-lens design) both designed to minimise TTL coupling. We show that both imaging systems meet the LISA requirement of +-25 um/rad for interfering beams with relative angles of up to +-300 urad. Furthermore, we found a dependency of the TTL coupling on beam properties such as the waist size and location, which we characterised both theoretically and experimentally. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.10320v1-abstract-full').style.display = 'none'; document.getElementById('1711.10320v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">This work will be submitted to CQG</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Classical and Quantum Gravity, 2018, Volume 35, Number 10 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1607.00408">arXiv:1607.00408</a> <span> [<a href="https://arxiv.org/pdf/1607.00408">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/0264-9381/33/24/245015">10.1088/0264-9381/33/24/245015 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design and construction of an optical test bed for LISA imaging systems and tilt-to-length coupling </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chwalla%2C+M">Michael Chwalla</a>, <a href="/search/physics?searchtype=author&query=Danzmann%2C+K">Karsten Danzmann</a>, <a href="/search/physics?searchtype=author&query=Barranco%2C+G+F">Germ谩n Fern谩ndez Barranco</a>, <a href="/search/physics?searchtype=author&query=Fitzsimons%2C+E">Ewan Fitzsimons</a>, <a href="/search/physics?searchtype=author&query=Gerberding%2C+O">Oliver Gerberding</a>, <a href="/search/physics?searchtype=author&query=Heinzel%2C+G">Gerhard Heinzel</a>, <a href="/search/physics?searchtype=author&query=Killow%2C+C+J">Christian J Killow</a>, <a href="/search/physics?searchtype=author&query=Lieser%2C+M">Maike Lieser</a>, <a href="/search/physics?searchtype=author&query=Perreur-Lloyd%2C+M">Michael Perreur-Lloyd</a>, <a href="/search/physics?searchtype=author&query=Robertson%2C+D+I">David I Robertson</a>, <a href="/search/physics?searchtype=author&query=Schuster%2C+S">S枚nke Schuster</a>, <a href="/search/physics?searchtype=author&query=Schwarze%2C+T+S">Thomas S Schwarze</a>, <a href="/search/physics?searchtype=author&query=Tr%C3%B6bs%2C+M">Michael Tr枚bs</a>, <a href="/search/physics?searchtype=author&query=Ward%2C+H">Henry Ward</a>, <a href="/search/physics?searchtype=author&query=Zwetz%2C+M">Max Zwetz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1607.00408v3-abstract-short" style="display: inline;"> The Laser Interferometer Space Antenna (LISA) is a future space-based interferometric gravitational-wave detector consisting of three spacecraft in a triangular configuration. The interferometric measurements of path length changes between satellites will be performed on optical benches in the satellites. Angular misalignments of the interfering beams couple into the length measurement and represe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1607.00408v3-abstract-full').style.display = 'inline'; document.getElementById('1607.00408v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1607.00408v3-abstract-full" style="display: none;"> The Laser Interferometer Space Antenna (LISA) is a future space-based interferometric gravitational-wave detector consisting of three spacecraft in a triangular configuration. The interferometric measurements of path length changes between satellites will be performed on optical benches in the satellites. Angular misalignments of the interfering beams couple into the length measurement and represent a significant noise source. Imaging systems will be used to reduce this tilt-to-length coupling. We designed and constructed an optical test bed to experimentally investigate tilt-to-length coupling. It consists of two separate structures, a minimal optical bench and a telescope simulator. The minimal optical bench comprises the science interferometer where the local laser is interfered with light from a remote spacecraft. In our experiment, a simulated version of this received beam is generated on the telescope simulator. The telescope simulator provides a tilting beam, a reference interferometer and an additional static beam as a phase reference. The tilting beam can either be a flat-top beam or a Gaussian beam. We avoid tilt-to-length coupling in the reference interferometer by using a small photo diode placed at an image of the beam rotation point. We show that the test bed is operational with an initial measurement of tilt-to-length coupling without imaging systems. Furthermore, we show the design of two different imaging systems whose performance will be investigated in future experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1607.00408v3-abstract-full').style.display = 'none'; document.getElementById('1607.00408v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 December, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 July, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Classical and Quantum Gravity, 33(24):245015, 2016 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1412.2713">arXiv:1412.2713</a> <span> [<a href="https://arxiv.org/pdf/1412.2713">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Space Physics">physics.space-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s10686-014-9433-y">10.1007/s10686-014-9433-y <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design of a dual species atom interferometer for space </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Schuldt%2C+T">Thilo Schuldt</a>, <a href="/search/physics?searchtype=author&query=Schubert%2C+C">Christian Schubert</a>, <a href="/search/physics?searchtype=author&query=Krutzik%2C+M">Markus Krutzik</a>, <a href="/search/physics?searchtype=author&query=Bote%2C+L+G">Lluis Gesa Bote</a>, <a href="/search/physics?searchtype=author&query=Gaaloul%2C+N">Naceur Gaaloul</a>, <a href="/search/physics?searchtype=author&query=Hartwig%2C+J">Jonas Hartwig</a>, <a href="/search/physics?searchtype=author&query=Ahlers%2C+H">Holger Ahlers</a>, <a href="/search/physics?searchtype=author&query=Herr%2C+W">Waldemar Herr</a>, <a href="/search/physics?searchtype=author&query=Posso-Trujillo%2C+K">Katerine Posso-Trujillo</a>, <a href="/search/physics?searchtype=author&query=Rudolph%2C+J">Jan Rudolph</a>, <a href="/search/physics?searchtype=author&query=Seidel%2C+S">Stephan Seidel</a>, <a href="/search/physics?searchtype=author&query=Wendrich%2C+T">Thijs Wendrich</a>, <a href="/search/physics?searchtype=author&query=Ertmer%2C+W">Wolfgang Ertmer</a>, <a href="/search/physics?searchtype=author&query=Herrmann%2C+S">Sven Herrmann</a>, <a href="/search/physics?searchtype=author&query=Kubelka-Lange%2C+A">Andr茅 Kubelka-Lange</a>, <a href="/search/physics?searchtype=author&query=Milke%2C+A">Alexander Milke</a>, <a href="/search/physics?searchtype=author&query=Rievers%2C+B">Benny Rievers</a>, <a href="/search/physics?searchtype=author&query=Rocco%2C+E">Emanuele Rocco</a>, <a href="/search/physics?searchtype=author&query=Hinton%2C+A">Andrew Hinton</a>, <a href="/search/physics?searchtype=author&query=Bongs%2C+K">Kai Bongs</a>, <a href="/search/physics?searchtype=author&query=Oswald%2C+M">Markus Oswald</a>, <a href="/search/physics?searchtype=author&query=Franz%2C+M">Matthias Franz</a>, <a href="/search/physics?searchtype=author&query=Hauth%2C+M">Matthias Hauth</a>, <a href="/search/physics?searchtype=author&query=Peters%2C+A">Achim Peters</a>, <a href="/search/physics?searchtype=author&query=Bawamia%2C+A">Ahmad Bawamia</a> , et al. (32 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1412.2713v1-abstract-short" style="display: inline;"> Atom interferometers have a multitude of proposed applications in space including precise measurements of the Earth's gravitational field, in navigation & ranging, and in fundamental physics such as tests of the weak equivalence principle (WEP) and gravitational wave detection. While atom interferometers are realized routinely in ground-based laboratories, current efforts aim at the development of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.2713v1-abstract-full').style.display = 'inline'; document.getElementById('1412.2713v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1412.2713v1-abstract-full" style="display: none;"> Atom interferometers have a multitude of proposed applications in space including precise measurements of the Earth's gravitational field, in navigation & ranging, and in fundamental physics such as tests of the weak equivalence principle (WEP) and gravitational wave detection. While atom interferometers are realized routinely in ground-based laboratories, current efforts aim at the development of a space compatible design optimized with respect to dimensions, weight, power consumption, mechanical robustness and radiation hardness. In this paper, we present a design of a high-sensitivity differential dual species $^{85}$Rb/$^{87}$Rb atom interferometer for space, including physics package, laser system, electronics and software. The physics package comprises the atom source consisting of dispensers and a 2D magneto-optical trap (MOT), the science chamber with a 3D-MOT, a magnetic trap based on an atom chip and an optical dipole trap (ODT) used for Bose-Einstein condensate (BEC) creation and interferometry, the detection unit, the vacuum system for $10^{-11}$ mbar ultra-high vacuum generation, and the high-suppression factor magnetic shielding as well as the thermal control system. The laser system is based on a hybrid approach using fiber-based telecom components and high-power laser diode technology and includes all laser sources for 2D-MOT, 3D-MOT, ODT, interferometry and detection. Manipulation and switching of the laser beams is carried out on an optical bench using Zerodur bonding technology. The instrument consists of 9 units with an overall mass of 221 kg, an average power consumption of 608 W (819 W peak), and a volume of 470 liters which would well fit on a satellite to be launched with a Soyuz rocket, as system studies have shown. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.2713v1-abstract-full').style.display = 'none'; document.getElementById('1412.2713v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 December, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">30 pages, 23 figures, accepted for publication in Experimental Astronomy</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.5980">arXiv:1312.5980</a> <span> [<a href="https://arxiv.org/pdf/1312.5980">pdf</a>, <a href="https://arxiv.org/format/1312.5980">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Space Physics">physics.space-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/0264-9381/31/11/115010">10.1088/0264-9381/31/11/115010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> STE-QUEST - Test of the Universality of Free Fall Using Cold Atom Interferometry </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aguilera%2C+D">D. Aguilera</a>, <a href="/search/physics?searchtype=author&query=Ahlers%2C+H">H. Ahlers</a>, <a href="/search/physics?searchtype=author&query=Battelier%2C+B">B. Battelier</a>, <a href="/search/physics?searchtype=author&query=Bawamia%2C+A">A. Bawamia</a>, <a href="/search/physics?searchtype=author&query=Bertoldi%2C+A">A. Bertoldi</a>, <a href="/search/physics?searchtype=author&query=Bondarescu%2C+R">R. Bondarescu</a>, <a href="/search/physics?searchtype=author&query=Bongs%2C+K">K. Bongs</a>, <a href="/search/physics?searchtype=author&query=Bouyer%2C+P">P. Bouyer</a>, <a href="/search/physics?searchtype=author&query=Braxmaier%2C+C">C. Braxmaier</a>, <a href="/search/physics?searchtype=author&query=Cacciapuoti%2C+L">L. Cacciapuoti</a>, <a href="/search/physics?searchtype=author&query=Chaloner%2C+C">C. Chaloner</a>, <a href="/search/physics?searchtype=author&query=Chwalla%2C+M">M. Chwalla</a>, <a href="/search/physics?searchtype=author&query=Ertmer%2C+W">W. Ertmer</a>, <a href="/search/physics?searchtype=author&query=Franz%2C+M">M. Franz</a>, <a href="/search/physics?searchtype=author&query=Gaaloul%2C+N">N. Gaaloul</a>, <a href="/search/physics?searchtype=author&query=Gehler%2C+M">M. Gehler</a>, <a href="/search/physics?searchtype=author&query=Gerardi%2C+D">D. Gerardi</a>, <a href="/search/physics?searchtype=author&query=Gesa%2C+L">L. Gesa</a>, <a href="/search/physics?searchtype=author&query=G%C3%BCrlebeck%2C+N">N. G眉rlebeck</a>, <a href="/search/physics?searchtype=author&query=Hartwig%2C+J">J. Hartwig</a>, <a href="/search/physics?searchtype=author&query=Hauth%2C+M">M. Hauth</a>, <a href="/search/physics?searchtype=author&query=Hellmig%2C+O">O. Hellmig</a>, <a href="/search/physics?searchtype=author&query=Herr%2C+W">W. Herr</a>, <a href="/search/physics?searchtype=author&query=Herrmann%2C+S">S. Herrmann</a>, <a href="/search/physics?searchtype=author&query=Heske%2C+A">A. Heske</a> , et al. (41 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1312.5980v2-abstract-short" style="display: inline;"> The theory of general relativity describes macroscopic phenomena driven by the influence of gravity while quantum mechanics brilliantly accounts for microscopic effects. Despite their tremendous individual success, a complete unification of fundamental interactions is missing and remains one of the most challenging and important quests in modern theoretical physics. The STE-QUEST satellite mission… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.5980v2-abstract-full').style.display = 'inline'; document.getElementById('1312.5980v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.5980v2-abstract-full" style="display: none;"> The theory of general relativity describes macroscopic phenomena driven by the influence of gravity while quantum mechanics brilliantly accounts for microscopic effects. Despite their tremendous individual success, a complete unification of fundamental interactions is missing and remains one of the most challenging and important quests in modern theoretical physics. The STE-QUEST satellite mission, proposed as a medium-size mission within the Cosmic Vision program of the European Space Agency (ESA), aims for testing general relativity with high precision in two experiments by performing a measurement of the gravitational redshift of the Sun and the Moon by comparing terrestrial clocks, and by performing a test of the Universality of Free Fall of matter waves in the gravitational field of Earth comparing the trajectory of two Bose-Einstein condensates of Rb85 and Rb87. The two ultracold atom clouds are monitored very precisely thanks to techniques of atom interferometry. This allows to reach down to an uncertainty in the E枚tv枚s parameter of at least 2x10E-15. In this paper, we report about the results of the phase A mission study of the atom interferometer instrument covering the description of the main payload elements, the atomic source concept, and the systematic error sources. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.5980v2-abstract-full').style.display = 'none'; document.getElementById('1312.5980v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.0942">arXiv:1211.0942</a> <span> [<a href="https://arxiv.org/pdf/1211.0942">pdf</a>, <a href="https://arxiv.org/format/1211.0942">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="History and Philosophy of Physics">physics.hist-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1367-2630/18/1/013007">10.1088/1367-2630/18/1/013007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Can different quantum state vectors correspond to the same physical state? An experimental test </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Nigg%2C+D">Daniel Nigg</a>, <a href="/search/physics?searchtype=author&query=Monz%2C+T">Thomas Monz</a>, <a href="/search/physics?searchtype=author&query=Schindler%2C+P">Philipp Schindler</a>, <a href="/search/physics?searchtype=author&query=Martinez%2C+E+A">Esteban A. Martinez</a>, <a href="/search/physics?searchtype=author&query=Chwalla%2C+M">Michael Chwalla</a>, <a href="/search/physics?searchtype=author&query=Hennrich%2C+M">Markus Hennrich</a>, <a href="/search/physics?searchtype=author&query=Blatt%2C+R">Rainer Blatt</a>, <a href="/search/physics?searchtype=author&query=Pusey%2C+M+F">Matthew F. Pusey</a>, <a href="/search/physics?searchtype=author&query=Rudolph%2C+T">Terry Rudolph</a>, <a href="/search/physics?searchtype=author&query=Barrett%2C+J">Jonathan Barrett</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1211.0942v1-abstract-short" style="display: inline;"> A century on from the development of quantum theory, the interpretation of a quantum state is still discussed. If a physicist claims to have produced a system with a particular wave function, does this represent directly a physical wave of some kind, or is the wave function merely a summary of knowledge, or information, about the system? A recent no-go theorem shows that models in which the wave f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.0942v1-abstract-full').style.display = 'inline'; document.getElementById('1211.0942v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.0942v1-abstract-full" style="display: none;"> A century on from the development of quantum theory, the interpretation of a quantum state is still discussed. If a physicist claims to have produced a system with a particular wave function, does this represent directly a physical wave of some kind, or is the wave function merely a summary of knowledge, or information, about the system? A recent no-go theorem shows that models in which the wave function is not physical, but corresponds only to an experimenter's information about a hypothetical real state of the system, must make different predictions from quantum theory when a certain test is carried out. Here we report on an experimental implementation using trapped ions. Within experimental error, the results confirm quantum theory. We analyse which kinds of theories are ruled out. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.0942v1-abstract-full').style.display = 'none'; document.getElementById('1211.0942v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> New J. Phys. 18, 013007 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0806.1414">arXiv:0806.1414</a> <span> [<a href="https://arxiv.org/pdf/0806.1414">pdf</a>, <a href="https://arxiv.org/ps/0806.1414">ps</a>, <a href="https://arxiv.org/format/0806.1414">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.102.023002">10.1103/PhysRevLett.102.023002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Absolute frequency measurement of the 40Ca+ S1/2 - D5/2 clock transition </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chwalla%2C+M">M. Chwalla</a>, <a href="/search/physics?searchtype=author&query=Benhelm%2C+J">J. Benhelm</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+K">K. Kim</a>, <a href="/search/physics?searchtype=author&query=Kirchmair%2C+G">G. Kirchmair</a>, <a href="/search/physics?searchtype=author&query=Monz%2C+T">T. Monz</a>, <a href="/search/physics?searchtype=author&query=Riebe%2C+M">M. Riebe</a>, <a href="/search/physics?searchtype=author&query=Schindler%2C+P">P. Schindler</a>, <a href="/search/physics?searchtype=author&query=Villar%2C+A+S">A. S. Villar</a>, <a href="/search/physics?searchtype=author&query=Haensel%2C+W">W. Haensel</a>, <a href="/search/physics?searchtype=author&query=Roos%2C+C+F">C. F. Roos</a>, <a href="/search/physics?searchtype=author&query=Blatt%2C+R">R. Blatt</a>, <a href="/search/physics?searchtype=author&query=Abgrall%2C+M">M. Abgrall</a>, <a href="/search/physics?searchtype=author&query=Santarelli%2C+G">G. Santarelli</a>, <a href="/search/physics?searchtype=author&query=Rovera%2C+G+D">G. D. Rovera</a>, <a href="/search/physics?searchtype=author&query=Laurent%2C+P">Ph. Laurent</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0806.1414v1-abstract-short" style="display: inline;"> We report on the first absolute transition frequency measurement at the 10^{-15} level with a single, laser-cooled 40Ca+ ion in a linear Paul trap. For this measurement, a frequency comb is referenced to the transportable Cs atomic fountain clock of LNE-SYRTE and is used to measure the S1/2-D5/2 electric-quadrupole transition frequency. After the correction of systematic shifts, the clock transi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0806.1414v1-abstract-full').style.display = 'inline'; document.getElementById('0806.1414v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0806.1414v1-abstract-full" style="display: none;"> We report on the first absolute transition frequency measurement at the 10^{-15} level with a single, laser-cooled 40Ca+ ion in a linear Paul trap. For this measurement, a frequency comb is referenced to the transportable Cs atomic fountain clock of LNE-SYRTE and is used to measure the S1/2-D5/2 electric-quadrupole transition frequency. After the correction of systematic shifts, the clock transition frequency f_Ca+ = 411 042 129 776 393.2 (1.0) Hz is obtained, which corresponds to a fractional uncertainty within a factor of three of the Cs standard. Future improvements are expected to lead to an uncertainty surpassing the best Cs fountain clocks. In addition, we determine the Lande g-factor of the D5/2 level to be gD5/2=1.2003340(3). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0806.1414v1-abstract-full').style.display = 'none'; document.getElementById('0806.1414v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 June, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2008. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 102, 023002 (2009) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0706.3186">arXiv:0706.3186</a> <span> [<a href="https://arxiv.org/pdf/0706.3186">pdf</a>, <a href="https://arxiv.org/ps/0706.3186">ps</a>, <a href="https://arxiv.org/format/0706.3186">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s00340-007-2867-4">10.1007/s00340-007-2867-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precision spectroscopy with two correlated atoms </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chwalla%2C+M">M. Chwalla</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+K">K. Kim</a>, <a href="/search/physics?searchtype=author&query=Monz%2C+T">T. Monz</a>, <a href="/search/physics?searchtype=author&query=schindler%2C+P">P. schindler</a>, <a href="/search/physics?searchtype=author&query=Riebe%2C+M">M. Riebe</a>, <a href="/search/physics?searchtype=author&query=Roos%2C+C+F">C. F. Roos</a>, <a href="/search/physics?searchtype=author&query=Blatt%2C+R">R. Blatt</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0706.3186v2-abstract-short" style="display: inline;"> We discuss techniques that allow for long coherence times in laser spectroscopy experiments with two trapped ions. We show that for this purpose not only entangled ions prepared in decoherence-free subspaces can be used but also a pair of ions that are not entangled but subject to the same kind of phase noise. We apply this technique to a measurement of the electric quadrupole moment of the 3d D… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0706.3186v2-abstract-full').style.display = 'inline'; document.getElementById('0706.3186v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0706.3186v2-abstract-full" style="display: none;"> We discuss techniques that allow for long coherence times in laser spectroscopy experiments with two trapped ions. We show that for this purpose not only entangled ions prepared in decoherence-free subspaces can be used but also a pair of ions that are not entangled but subject to the same kind of phase noise. We apply this technique to a measurement of the electric quadrupole moment of the 3d D5/2 state of 40Ca+ and to a measurement of the linewidth of an ultrastable laser exciting a pair of 40Ca+ ions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0706.3186v2-abstract-full').style.display = 'none'; document.getElementById('0706.3186v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 November, 2007; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 June, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2007. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Appl. Phys. B 89, 483-488 (2007) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/quant-ph/0701215">arXiv:quant-ph/0701215</a> <span> [<a href="https://arxiv.org/pdf/quant-ph/0701215">pdf</a>, <a href="https://arxiv.org/ps/quant-ph/0701215">ps</a>, <a href="https://arxiv.org/format/quant-ph/0701215">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/nature05101">10.1038/nature05101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> 'Designer atoms' for quantum metrology </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Roos%2C+C+F">C. F. Roos</a>, <a href="/search/physics?searchtype=author&query=Chwalla%2C+M">M. Chwalla</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+K">K. Kim</a>, <a href="/search/physics?searchtype=author&query=Riebe%2C+M">M. Riebe</a>, <a href="/search/physics?searchtype=author&query=Blatt%2C+R">R. Blatt</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="quant-ph/0701215v1-abstract-short" style="display: inline;"> Entanglement is recognized as a key resource for quantum computation and quantum cryptography. For quantum metrology, the use of entangled states has been discussed and demonstrated as a means of improving the signal-to-noise ratio. In addition, entangled states have been used in experiments for efficient quantum state detection and for the measurement of scattering lengths. In quantum informati… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('quant-ph/0701215v1-abstract-full').style.display = 'inline'; document.getElementById('quant-ph/0701215v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="quant-ph/0701215v1-abstract-full" style="display: none;"> Entanglement is recognized as a key resource for quantum computation and quantum cryptography. For quantum metrology, the use of entangled states has been discussed and demonstrated as a means of improving the signal-to-noise ratio. In addition, entangled states have been used in experiments for efficient quantum state detection and for the measurement of scattering lengths. In quantum information processing, manipulation of individual quantum bits allows for the tailored design of specific states that are insensitive to the detrimental influences of an environment. Such 'decoherence-free subspaces' protect quantum information and yield significantly enhanced coherence times. Here we use a decoherence-free subspace with specifically designed entangled states to demonstrate precision spectroscopy of a pair of trapped Ca+ ions; we obtain the electric quadrupole moment, which is of use for frequency standard applications. We find that entangled states are not only useful for enhancing the signal-to-noise ratio in frequency measurements - a suitably designed pair of atoms also allows clock measurements in the presence of strong technical noise. Our technique makes explicit use of non-locality as an entanglement property and provides an approach for 'designed' quantum metrology. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('quant-ph/0701215v1-abstract-full').style.display = 'none'; document.getElementById('quant-ph/0701215v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 January, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2007. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 443, 316 (2006) </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns 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