Cooling phonon modes of a Bose condensate with uniform few body losses
We present a general analysis of the cooling produced by losses on condensates or quasi-condensates. We study how the occupations of the collective phonon modes evolve in time, assuming that the loss process is slow enough so that each mode adiabatically follows the decrease of the mean density....
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| Format: | Article |
| Language: | English |
| Published: |
SciPost
2018-11-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.5.5.043 |
| _version_ | 1817998374495846400 |
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| author | Isabelle Bouchoule, Max Schemmer, Carsten Henkel |
| author_facet | Isabelle Bouchoule, Max Schemmer, Carsten Henkel |
| author_sort | Isabelle Bouchoule, Max Schemmer, Carsten Henkel |
| collection | DOAJ |
| description | We present a general analysis of the cooling produced by losses on
condensates or quasi-condensates. We study how the occupations of the
collective phonon modes evolve in time, assuming that the loss process is slow
enough so that each mode adiabatically follows the decrease of the mean
density. The theory is valid for any loss process whose rate is proportional to
the $j$th power of the density, but otherwise spatially uniform. We cover both
homogeneous gases and systems confined in a smooth potential. For a
low-dimensional gas, we can take into account the modified equation of state
due to the broadening of the cloud width along the tightly confined directions,
which occurs for large interactions. We find that at large times, the
temperature decreases proportionally to the energy scale $mc^2$, where $m$ is
the mass of the particles and $c$ the sound velocity. We compute the asymptotic
ratio of these two quantities for different limiting cases: a homogeneous gas
in any dimension and a one-dimensional gas in a harmonic trap. |
| first_indexed | 2024-04-14T02:52:19Z |
| format | Article |
| id | doaj.art-51e80917eaad483fad88fa345b06e4de |
| institution | Directory Open Access Journal |
| issn | 2542-4653 |
| language | English |
| last_indexed | 2024-04-14T02:52:19Z |
| publishDate | 2018-11-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj.art-51e80917eaad483fad88fa345b06e4de2022-12-22T02:16:15ZengSciPostSciPost Physics2542-46532018-11-015504310.21468/SciPostPhys.5.5.043Cooling phonon modes of a Bose condensate with uniform few body lossesIsabelle Bouchoule, Max Schemmer, Carsten HenkelWe present a general analysis of the cooling produced by losses on condensates or quasi-condensates. We study how the occupations of the collective phonon modes evolve in time, assuming that the loss process is slow enough so that each mode adiabatically follows the decrease of the mean density. The theory is valid for any loss process whose rate is proportional to the $j$th power of the density, but otherwise spatially uniform. We cover both homogeneous gases and systems confined in a smooth potential. For a low-dimensional gas, we can take into account the modified equation of state due to the broadening of the cloud width along the tightly confined directions, which occurs for large interactions. We find that at large times, the temperature decreases proportionally to the energy scale $mc^2$, where $m$ is the mass of the particles and $c$ the sound velocity. We compute the asymptotic ratio of these two quantities for different limiting cases: a homogeneous gas in any dimension and a one-dimensional gas in a harmonic trap.https://scipost.org/SciPostPhys.5.5.043 |
| spellingShingle | Isabelle Bouchoule, Max Schemmer, Carsten Henkel Cooling phonon modes of a Bose condensate with uniform few body losses SciPost Physics |
| title | Cooling phonon modes of a Bose condensate with uniform few body losses |
| title_full | Cooling phonon modes of a Bose condensate with uniform few body losses |
| title_fullStr | Cooling phonon modes of a Bose condensate with uniform few body losses |
| title_full_unstemmed | Cooling phonon modes of a Bose condensate with uniform few body losses |
| title_short | Cooling phonon modes of a Bose condensate with uniform few body losses |
| title_sort | cooling phonon modes of a bose condensate with uniform few body losses |
| url | https://scipost.org/SciPostPhys.5.5.043 |
| work_keys_str_mv | AT isabellebouchoulemaxschemmercarstenhenkel coolingphononmodesofabosecondensatewithuniformfewbodylosses |