Coherent quantum depletion of an interacting atom condensate
Sufficiently strong interactions promote coherent quantum transitions in spite of thermalization and losses, which are the adversaries of delicate effects such as reversibility and correlations. In atomic Bose–Einstein condensates (BECs), strong atom–atom interactions can eject atoms from the BEC to...
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Nature Pub. Group
2015
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4382704/ |
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pubmed-43827042015-04-07 Coherent quantum depletion of an interacting atom condensate Kira, M. Article Sufficiently strong interactions promote coherent quantum transitions in spite of thermalization and losses, which are the adversaries of delicate effects such as reversibility and correlations. In atomic Bose–Einstein condensates (BECs), strong atom–atom interactions can eject atoms from the BEC to the normal component, yielding quantum depletion instead of temperature depletion. A recent experiment has already been verified to overcome losses. Here I show that it also achieves coherent quantum-depletion dynamics in a BEC swept fast enough from weak to strong atom–atom interactions. The elementary coherent process first excites the normal component into a liquid state that evolves into a spherical shell state, where the atom occupation peaks at a finite momentum to shield 50% of the BEC atoms from annihilation. The identified coherent processes resemble ultrafast semiconductor excitations expanding the scope of BEC explorations to many-body non-equilibrium studies. Nature Pub. Group 2015-03-13 /pmc/articles/PMC4382704/ /pubmed/25767044 http://dx.doi.org/10.1038/ncomms7624 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Kira, M. |
| spellingShingle |
Kira, M. Coherent quantum depletion of an interacting atom condensate |
| author_facet |
Kira, M. |
| author_sort |
Kira, M. |
| title |
Coherent quantum depletion of an interacting atom condensate |
| title_short |
Coherent quantum depletion of an interacting atom condensate |
| title_full |
Coherent quantum depletion of an interacting atom condensate |
| title_fullStr |
Coherent quantum depletion of an interacting atom condensate |
| title_full_unstemmed |
Coherent quantum depletion of an interacting atom condensate |
| title_sort |
coherent quantum depletion of an interacting atom condensate |
| description |
Sufficiently strong interactions promote coherent quantum transitions in spite of thermalization and losses, which are the adversaries of delicate effects such as reversibility and correlations. In atomic Bose–Einstein condensates (BECs), strong atom–atom interactions can eject atoms from the BEC to the normal component, yielding quantum depletion instead of temperature depletion. A recent experiment has already been verified to overcome losses. Here I show that it also achieves coherent quantum-depletion dynamics in a BEC swept fast enough from weak to strong atom–atom interactions. The elementary coherent process first excites the normal component into a liquid state that evolves into a spherical shell state, where the atom occupation peaks at a finite momentum to shield 50% of the BEC atoms from annihilation. The identified coherent processes resemble ultrafast semiconductor excitations expanding the scope of BEC explorations to many-body non-equilibrium studies. |
| publisher |
Nature Pub. Group |
| publishDate |
2015 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4382704/ |
| _version_ |
1613206636504023040 |