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</div> <div class="control"> <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/quant-ph/0003096">arXiv:quant-ph/0003096</a> <span> [<a href="https://arxiv.org/pdf/quant-ph/0003096">pdf</a>, <a href="https://arxiv.org/ps/quant-ph/0003096">ps</a>, <a href="https://arxiv.org/format/quant-ph/0003096">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> </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/10.1080/09500340008232182">10.1080/09500340008232182 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ground state cooling, quantum state engineering and study of decoherence of ions in Paul traps </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Schmidt-Kaler%2C+F">F. Schmidt-Kaler</a>, <a href="/search/quant-ph?searchtype=author&query=Roos%2C+C">Ch. Roos</a>, <a href="/search/quant-ph?searchtype=author&query=Naegerl%2C+H+C">H. C. Naegerl</a>, <a href="/search/quant-ph?searchtype=author&query=Rohde%2C+H">H. Rohde</a>, <a href="/search/quant-ph?searchtype=author&query=Gulde%2C+S">S. Gulde</a>, <a href="/search/quant-ph?searchtype=author&query=Mundt%2C+A">A. Mundt</a>, <a href="/search/quant-ph?searchtype=author&query=Lederbauer%2C+M">M. Lederbauer</a>, <a href="/search/quant-ph?searchtype=author&query=Thalhammer%2C+G">G. Thalhammer</a>, <a href="/search/quant-ph?searchtype=author&query=Zeiger%2C+T">Th. Zeiger</a>, <a href="/search/quant-ph?searchtype=author&query=Barton%2C+P">P. Barton</a>, <a href="/search/quant-ph?searchtype=author&query=Hornekaer%2C+L">L. Hornekaer</a>, <a href="/search/quant-ph?searchtype=author&query=Reymond%2C+G">G. Reymond</a>, <a href="/search/quant-ph?searchtype=author&query=Leibfried%2C+D">D. Leibfried</a>, <a href="/search/quant-ph?searchtype=author&query=Eschner%2C+J">J. Eschner</a>, <a href="/search/quant-ph?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/0003096v1-abstract-short" style="display: inline;"> We investigate single ions of $^{40}Ca^+$ in Paul traps for quantum information processing. Superpositions of the S$_{1/2}$ electronic ground state and the metastable D$_{5/2}$ state are used to implement a qubit. Laser light on the S$_{1/2} \leftrightarrow$ D$_{5/2}$ transition is used for the manipulation of the ion's quantum state. We apply sideband cooling to the ion and reach the ground sta… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('quant-ph/0003096v1-abstract-full').style.display = 'inline'; document.getElementById('quant-ph/0003096v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="quant-ph/0003096v1-abstract-full" style="display: none;"> We investigate single ions of $^{40}Ca^+$ in Paul traps for quantum information processing. Superpositions of the S$_{1/2}$ electronic ground state and the metastable D$_{5/2}$ state are used to implement a qubit. Laser light on the S$_{1/2} \leftrightarrow$ D$_{5/2}$ transition is used for the manipulation of the ion's quantum state. We apply sideband cooling to the ion and reach the ground state of vibration with up to 99.9% probability. Starting from this Fock state $|n=0>$, we demonstrate coherent quantum state manipulation. A large number of Rabi oscillations and a ms-coherence time is observed. Motional heating is measured to be as low as one vibrational quantum in 190 ms. We also report on ground state cooling of two ions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('quant-ph/0003096v1-abstract-full').style.display = 'none'; document.getElementById('quant-ph/0003096v1-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> 21 March, 2000; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2000. </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">12 pages, 6 figures. submitted to Journal of Modern Optics, Special Issue on Quantum Optics: Kuehtai 2000</span> </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/9910056">arXiv:quant-ph/9910056</a> <span> [<a href="https://arxiv.org/pdf/quant-ph/9910056">pdf</a>, <a href="https://arxiv.org/ps/quant-ph/9910056">ps</a>, <a href="https://arxiv.org/format/quant-ph/9910056">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> </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/PhysRevA.61.045801">10.1103/PhysRevA.61.045801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evaluation of heating effects on atoms trapped in an optical trap </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Gardiner%2C+C+W">C. W. Gardiner</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">J. Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Nagerl%2C+H+C">H. C. Nagerl</a>, <a href="/search/quant-ph?searchtype=author&query=Kimble%2C+H+J">H. J. Kimble</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/9910056v1-abstract-short" style="display: inline;"> We solve a stochastic master equation based on the theory of Savard et al. [T.A. Savard, K.M. O'Hara and J.E. Thomas, Phys. Rev. A 56, R1095 (1997)] for heating arising from fluctuations in the trapping laser intensity. We compare with recent experiments of Ye et. al. [J. Ye, D.W. Vernooy and H.J. Kimble, Trapping of single atoms in cavity QED, quant-ph/9908007, Phys. Rev. Lett. (1999 in press)]… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('quant-ph/9910056v1-abstract-full').style.display = 'inline'; document.getElementById('quant-ph/9910056v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="quant-ph/9910056v1-abstract-full" style="display: none;"> We solve a stochastic master equation based on the theory of Savard et al. [T.A. Savard, K.M. O'Hara and J.E. Thomas, Phys. Rev. A 56, R1095 (1997)] for heating arising from fluctuations in the trapping laser intensity. We compare with recent experiments of Ye et. al. [J. Ye, D.W. Vernooy and H.J. Kimble, Trapping of single atoms in cavity QED, quant-ph/9908007, Phys. Rev. Lett. (1999 in press)], and find good agreement with the experimental measurements of the distribution of trap occupancy times. The major cause of trap loss arises from the broadening of the energy distribution of the trapped atom, rather than the mean heating rate, which is a very much smaller effect. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('quant-ph/9910056v1-abstract-full').style.display = 'none'; document.getElementById('quant-ph/9910056v1-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 October, 1999; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 1999. </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">3 pages TeX plus 4 postscript files</span> </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/9909038">arXiv:quant-ph/9909038</a> <span> [<a href="https://arxiv.org/pdf/quant-ph/9909038">pdf</a>, <a href="https://arxiv.org/ps/quant-ph/9909038">ps</a>, <a href="https://arxiv.org/format/quant-ph/9909038">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> </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.83.4713">10.1103/PhysRevLett.83.4713 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quantum state engineering on an optical transition and decoherence in a Paul trap </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Roos%2C+C">Ch. Roos</a>, <a href="/search/quant-ph?searchtype=author&query=Zeiger%2C+T">Th. Zeiger</a>, <a href="/search/quant-ph?searchtype=author&query=Rohde%2C+H">H. Rohde</a>, <a href="/search/quant-ph?searchtype=author&query=Naegerl%2C+H+C">H. C. Naegerl</a>, <a href="/search/quant-ph?searchtype=author&query=Eschner%2C+J">J. Eschner</a>, <a href="/search/quant-ph?searchtype=author&query=Leibfried%2C+D">D. Leibfried</a>, <a href="/search/quant-ph?searchtype=author&query=Schmidt-Kaler%2C+F">F. Schmidt-Kaler</a>, <a href="/search/quant-ph?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/9909038v1-abstract-short" style="display: inline;"> A single Ca+ ion in a Paul trap has been cooled to the ground state of vibration with up to 99.9% probability. Starting from this Fock state |n=0> we have demonstrated coherent quantum state manipulation on an optical transition. Up to 30 Rabi oscillations within 1.4 ms have been observed. We find a similar number of Rabi oscillations after preparation of the ion in the |n=1> Fock state. The coh… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('quant-ph/9909038v1-abstract-full').style.display = 'inline'; document.getElementById('quant-ph/9909038v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="quant-ph/9909038v1-abstract-full" style="display: none;"> A single Ca+ ion in a Paul trap has been cooled to the ground state of vibration with up to 99.9% probability. Starting from this Fock state |n=0> we have demonstrated coherent quantum state manipulation on an optical transition. Up to 30 Rabi oscillations within 1.4 ms have been observed. We find a similar number of Rabi oscillations after preparation of the ion in the |n=1> Fock state. The coherence of optical state manipulation is only limited by laser and ambient magnetic field fluctuations. Motional heating has been measured to be as low as one vibrational quantum in 190 ms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('quant-ph/9909038v1-abstract-full').style.display = 'none'; document.getElementById('quant-ph/9909038v1-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, 1999; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 1999. </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">4 pages, 5 figures</span> </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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