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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/1805.01265">arXiv:1805.01265</a> <span> [<a href="https://arxiv.org/pdf/1805.01265">pdf</a>, <a href="https://arxiv.org/format/1805.01265">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</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/10.1103/PhysRevD.97.124051">10.1103/PhysRevD.97.124051 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> BOOST -- A Satellite Mission to Test Lorentz Invariance Using High-Performance Optical Frequency References </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=G%C3%BCrlebeck%2C+N">Norman G眉rlebeck</a>, <a href="/search/physics?searchtype=author&query=W%C3%B6rner%2C+L">Lisa W枚rner</a>, <a href="/search/physics?searchtype=author&query=Schuldt%2C+T">Thilo Schuldt</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6ringshoff%2C+K">Klaus D枚ringshoff</a>, <a href="/search/physics?searchtype=author&query=Gaul%2C+K">Konstantin Gaul</a>, <a href="/search/physics?searchtype=author&query=Gerardi%2C+D">Domenico Gerardi</a>, <a href="/search/physics?searchtype=author&query=Grenzebach%2C+A">Arne Grenzebach</a>, <a href="/search/physics?searchtype=author&query=Jha%2C+N">Nandan Jha</a>, <a href="/search/physics?searchtype=author&query=Kovalchuk%2C+E">Evgeny Kovalchuk</a>, <a href="/search/physics?searchtype=author&query=Resch%2C+A">Andreas Resch</a>, <a href="/search/physics?searchtype=author&query=Wendrich%2C+T">Thijs Wendrich</a>, <a href="/search/physics?searchtype=author&query=Berger%2C+R">Robert Berger</a>, <a href="/search/physics?searchtype=author&query=Herrmann%2C+S">Sven Herrmann</a>, <a href="/search/physics?searchtype=author&query=Johann%2C+U">Ulrich Johann</a>, <a href="/search/physics?searchtype=author&query=Krutzik%2C+M">Markus Krutzik</a>, <a href="/search/physics?searchtype=author&query=Peters%2C+A">Achim Peters</a>, <a href="/search/physics?searchtype=author&query=Rasel%2C+E+M">Ernst M. Rasel</a>, <a href="/search/physics?searchtype=author&query=Braxmaier%2C+C">Claus Braxmaier</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="1805.01265v1-abstract-short" style="display: inline;"> BOOST (BOOst Symmetry Test) is a proposed satellite mission to search for violations of Lorentz invariance by comparing two optical frequency references. One is based on a long-term stable optical resonator and the other on a hyperfine transition in molecular iodine. This mission will allow to determine several parameters of the standard model extension in the electron sector up to two orders of m… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.01265v1-abstract-full').style.display = 'inline'; document.getElementById('1805.01265v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.01265v1-abstract-full" style="display: none;"> BOOST (BOOst Symmetry Test) is a proposed satellite mission to search for violations of Lorentz invariance by comparing two optical frequency references. One is based on a long-term stable optical resonator and the other on a hyperfine transition in molecular iodine. This mission will allow to determine several parameters of the standard model extension in the electron sector up to two orders of magnitude better than with the current best experiments. Here, we will give an overview of the mission, the science case and the payload. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.01265v1-abstract-full').style.display = 'none'; document.getElementById('1805.01265v1-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> 3 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </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">11 pages, 2 figures, accepted for publication in Phys. Rev. D</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.01032">arXiv:1508.01032</a> <span> [<a href="https://arxiv.org/pdf/1508.01032">pdf</a>, <a href="https://arxiv.org/format/1508.01032">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="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="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/10.1016/j.applthermaleng.2016.06.116">10.1016/j.applthermaleng.2016.06.116 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of a radiatively cooled system for quantum optomechanical experiments in space </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Pilan-Zanoni%2C+A">Andr茅 Pilan-Zanoni</a>, <a href="/search/physics?searchtype=author&query=Burkhardt%2C+J">Johannes Burkhardt</a>, <a href="/search/physics?searchtype=author&query=Johann%2C+U">Ulrich Johann</a>, <a href="/search/physics?searchtype=author&query=Aspelmeyer%2C+M">Markus Aspelmeyer</a>, <a href="/search/physics?searchtype=author&query=Kaltenbaek%2C+R">Rainer Kaltenbaek</a>, <a href="/search/physics?searchtype=author&query=Hechenblaikner%2C+G">Gerald Hechenblaikner</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="1508.01032v1-abstract-short" style="display: inline;"> The performance of a radiatively cooled instrument is investigated in the context of optomechanical quantum experiments, where the environment of a macroscopic particle in a quantum-superposition has to be cooled to less than 20\,K in deep space. A heat-transfer analysis between the components of the instrument as well as a transfer-function analysis on thermal oscillations induced by the spacecra… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.01032v1-abstract-full').style.display = 'inline'; document.getElementById('1508.01032v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.01032v1-abstract-full" style="display: none;"> The performance of a radiatively cooled instrument is investigated in the context of optomechanical quantum experiments, where the environment of a macroscopic particle in a quantum-superposition has to be cooled to less than 20\,K in deep space. A heat-transfer analysis between the components of the instrument as well as a transfer-function analysis on thermal oscillations induced by the spacecraft interior and by dissipative sources is performed. The thermal behaviour of the instrument in an orbit around a Lagrangian point and in a highly elliptical Earth orbit is discussed. Finally, we investigate further possible design improvements aiming at lower temperatures of the environment of the macroscopic particle. These include a mirror-based design of the imaging system on the optical bench and the extension of the heat shields. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.01032v1-abstract-full').style.display = 'none'; document.getElementById('1508.01032v1-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 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2015. </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, 11 figures, 3 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Appl. Therm. Eng. 107, 689 (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/1309.3234">arXiv:1309.3234</a> <span> [<a href="https://arxiv.org/pdf/1309.3234">pdf</a>, <a href="https://arxiv.org/ps/1309.3234">ps</a>, <a href="https://arxiv.org/format/1309.3234">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="Instrumentation and Methods for Astrophysics">astro-ph.IM</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="Instrumentation and Detectors">physics.ins-det</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/10.1088/1367-2630/16/1/013058">10.1088/1367-2630/16/1/013058 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> How cold can you get in space? Quantum Physics at cryogenic temperatures in space </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Hechenblaikner%2C+G">Gerald Hechenblaikner</a>, <a href="/search/physics?searchtype=author&query=Hufgard%2C+F">Fabian Hufgard</a>, <a href="/search/physics?searchtype=author&query=Burkhardt%2C+J">Johannes Burkhardt</a>, <a href="/search/physics?searchtype=author&query=Kiesel%2C+N">Nikolai Kiesel</a>, <a href="/search/physics?searchtype=author&query=Johann%2C+U">Ulrich Johann</a>, <a href="/search/physics?searchtype=author&query=Aspelmeyer%2C+M">Markus Aspelmeyer</a>, <a href="/search/physics?searchtype=author&query=Kaltenbaek%2C+R">Rainer Kaltenbaek</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="1309.3234v2-abstract-short" style="display: inline;"> Although it is often believed that the coldness of space is ideally suited for performing measurements at cryogenic temperatures, this must be regarded with caution for two reasons: Firstly, the sensitive instrument must be completely shielded from the strong solar radiation and therefore, e.g. either be placed inside a satellite or externally on the satellite's shaded side. Secondly, any platform… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.3234v2-abstract-full').style.display = 'inline'; document.getElementById('1309.3234v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1309.3234v2-abstract-full" style="display: none;"> Although it is often believed that the coldness of space is ideally suited for performing measurements at cryogenic temperatures, this must be regarded with caution for two reasons: Firstly, the sensitive instrument must be completely shielded from the strong solar radiation and therefore, e.g. either be placed inside a satellite or externally on the satellite's shaded side. Secondly, any platform hosting such an experiment in space generally provides an environment close to room temperature for the accommodated equipment. To obtain cryogenic temperatures without active cooling, one must isolate the instrument from radiative and conductive heat exchange with the platform as well as possible. We investigate the limits of this passive cooling method in the context of a recently proposed experiment to observe the decoherence of quantum superpositions of massive objects. The analyses and conclusions are applicable to a host of similar experimental designs requiring a cryogenic environment in space. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.3234v2-abstract-full').style.display = 'none'; document.getElementById('1309.3234v2-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> 13 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">16 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> New J. Phys. 16 (2014) 013058 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1201.4756">arXiv:1201.4756</a> <span> [<a href="https://arxiv.org/pdf/1201.4756">pdf</a>, <a href="https://arxiv.org/format/1201.4756">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="Instrumentation and Detectors">physics.ins-det</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/s10686-012-9292-3">10.1007/s10686-012-9292-3 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Macroscopic quantum resonators (MAQRO) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kaltenbaek%2C+R">Rainer Kaltenbaek</a>, <a href="/search/physics?searchtype=author&query=Hechenblaikner%2C+G">Gerald Hechenblaikner</a>, <a href="/search/physics?searchtype=author&query=Kiesel%2C+N">Nikolai Kiesel</a>, <a href="/search/physics?searchtype=author&query=Romero-Isart%2C+O">Oriol Romero-Isart</a>, <a href="/search/physics?searchtype=author&query=Schwab%2C+K+C">Keith C. Schwab</a>, <a href="/search/physics?searchtype=author&query=Johann%2C+U">Ulrich Johann</a>, <a href="/search/physics?searchtype=author&query=Aspelmeyer%2C+M">Markus Aspelmeyer</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="1201.4756v2-abstract-short" style="display: inline;"> Quantum physics challenges our understanding of the nature of physical reality and of space-time and suggests the necessity of radical revisions of their underlying concepts. Experimental tests of quantum phenomena involving massive macroscopic objects would provide novel insights into these fundamental questions. Making use of the unique environment provided by space, MAQRO aims at investigating… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.4756v2-abstract-full').style.display = 'inline'; document.getElementById('1201.4756v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1201.4756v2-abstract-full" style="display: none;"> Quantum physics challenges our understanding of the nature of physical reality and of space-time and suggests the necessity of radical revisions of their underlying concepts. Experimental tests of quantum phenomena involving massive macroscopic objects would provide novel insights into these fundamental questions. Making use of the unique environment provided by space, MAQRO aims at investigating this largely unexplored realm of macroscopic quantum physics. MAQRO has originally been proposed as a medium-sized fundamental-science space mission for the 2010 call of Cosmic Vision. MAQRO unites two experiments: DECIDE (DECoherence In Double-Slit Experiments) and CASE (Comparative Acceleration Sensing Experiment). The main scientific objective of MAQRO, which is addressed by the experiment DECIDE, is to test the predictions of quantum theory for quantum superpositions of macroscopic objects containing more than 10e8 atoms. Under these conditions, deviations due to various suggested alternative models to quantum theory would become visible. These models have been suggested to harmonize the paradoxical quantum phenomena both with the classical macroscopic world and with our notion of Minkowski space-time. The second scientific objective of MAQRO, which is addressed by the experiment CASE, is to demonstrate the performance of a novel type of inertial sensor based on optically trapped microspheres. CASE is a technology demonstrator that shows how the modular design of DECIDE allows to easily incorporate it with other missions that have compatible requirements in terms of spacecraft and orbit. CASE can, at the same time, serve as a test bench for the weak equivalence principle, i.e., the universality of free fall with test-masses differing in their mass by 7 orders of magnitude. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.4756v2-abstract-full').style.display = 'none'; document.getElementById('1201.4756v2-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 March, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2012. </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">Proposal for a medium-sized space mission, 28 pages, 9 figures - in v2, we corrected some minor mistakes and replaced fig. 9 with a higher-resolution version; Experimental Astronomy, March 2012, Online, Open Access</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Exp. Astron. 34 (2), 123-164 (2012) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1006.2122">arXiv:1006.2122</a> <span> [<a href="https://arxiv.org/pdf/1006.2122">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="Optics">physics.optics</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/10.1364/AO.49.005665">10.1364/AO.49.005665 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Coupling characterization and noise studies of the Optical Metrology System on-board the LISA Pathfinder Mission </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Hechenblaikner%2C+G">G. Hechenblaikner</a>, <a href="/search/physics?searchtype=author&query=Gerndt%2C+R">R. Gerndt</a>, <a href="/search/physics?searchtype=author&query=Johann%2C+U">U. Johann</a>, <a href="/search/physics?searchtype=author&query=Luetzow-Wentzky%2C+P">P. Luetzow-Wentzky</a>, <a href="/search/physics?searchtype=author&query=Wand%2C+V">V. Wand</a>, <a href="/search/physics?searchtype=author&query=Audley%2C+H">H. Audley</a>, <a href="/search/physics?searchtype=author&query=Danzmann%2C+K">K. Danzmann</a>, <a href="/search/physics?searchtype=author&query=Garcia-Marin%2C+A">A. Garcia-Marin</a>, <a href="/search/physics?searchtype=author&query=Heinzel%2C+G">G. Heinzel</a>, <a href="/search/physics?searchtype=author&query=Nofrarias%2C+M">M. Nofrarias</a>, <a href="/search/physics?searchtype=author&query=Steier%2C+F">F. Steier</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="1006.2122v1-abstract-short" style="display: inline;"> In this article we describe the first investigations of the complete engineering model of the Optical Metrology System (OMS), a key subsystem of the LISA Pathfinder science mission to space. The latter itself is a technological precursor mission to LISA, a space-borne gravitational wave detector. At its core, the OMS consists of four heterodyne Mach Zehnder interferometers, a highly stable laser w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1006.2122v1-abstract-full').style.display = 'inline'; document.getElementById('1006.2122v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1006.2122v1-abstract-full" style="display: none;"> In this article we describe the first investigations of the complete engineering model of the Optical Metrology System (OMS), a key subsystem of the LISA Pathfinder science mission to space. The latter itself is a technological precursor mission to LISA, a space-borne gravitational wave detector. At its core, the OMS consists of four heterodyne Mach Zehnder interferometers, a highly stable laser with external modulator and a phase-meter. It is designed to monitor and track the longitudinal motion and attitude of two floating test-masses in the optical reference frame with a (relative) precision in the picometer and nanorad range, respectively. We analyze sensor signal correlations and determine a physical sensor noise limit. The coupling parameters between motional degrees of freedom and interferometer signals are analytically derived and compared to measurements. We also measure adverse cross-coupling effects originating from system imperfections and limitations and describe algorithmic mitigation techniques to overcome some of them. Their impact on system performance is analyzed in the context of the Pathfinder mission. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1006.2122v1-abstract-full').style.display = 'none'; document.getElementById('1006.2122v1-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> 10 June, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2010. </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">34 pages double-spaced 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Appl.Opt.49:5665-5677,2010 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a 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