Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity
We study the effects of molecular rotations on the transition temperature of molecular Bose-Einstein condensates (BEC). A semi-analytical method that includes the translation and rotational degrees of freedom is introduced to compute the temperature dependence of the mean condensate number and the h...
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| Format: | Article |
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IOP Publishing
2019
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| _version_ | 1796961892250419200 |
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| author | Ooi, Chong Heng Raymond Liu, Wu Ming |
| author_facet | Ooi, Chong Heng Raymond Liu, Wu Ming |
| author_sort | Ooi, Chong Heng Raymond |
| collection | UM |
| description | We study the effects of molecular rotations on the transition temperature of molecular Bose-Einstein condensates (BEC). A semi-analytical method that includes the translation and rotational degrees of freedom is introduced to compute the temperature dependence of the mean condensate number and the heat capacity. Rotating molecules show a lower transition temperature and smaller heat capacity compared to an atomic BEC. The transition temperature increases with increased rotational frequency. These findings are explained and verified by analytical expressions that we derive. The results for three-, two- and one-dimensional harmonic traps are compared, showing a higher transition temperature for molecules in a lower dimensional trap. We discuss the possibility of realizing the trapping and rotational parameters. © 2019 IOP Publishing Ltd. |
| first_indexed | 2024-03-06T06:00:54Z |
| format | Article |
| id | um.eprints-23791 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T06:00:54Z |
| publishDate | 2019 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | um.eprints-237912020-02-14T02:29:37Z http://eprints.um.edu.my/23791/ Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity Ooi, Chong Heng Raymond Liu, Wu Ming Q Science (General) QC Physics We study the effects of molecular rotations on the transition temperature of molecular Bose-Einstein condensates (BEC). A semi-analytical method that includes the translation and rotational degrees of freedom is introduced to compute the temperature dependence of the mean condensate number and the heat capacity. Rotating molecules show a lower transition temperature and smaller heat capacity compared to an atomic BEC. The transition temperature increases with increased rotational frequency. These findings are explained and verified by analytical expressions that we derive. The results for three-, two- and one-dimensional harmonic traps are compared, showing a higher transition temperature for molecules in a lower dimensional trap. We discuss the possibility of realizing the trapping and rotational parameters. © 2019 IOP Publishing Ltd. IOP Publishing 2019 Article PeerReviewed Ooi, Chong Heng Raymond and Liu, Wu Ming (2019) Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity. Journal of Physics B: Atomic, Molecular and Optical Physics, 52 (14). p. 145301. ISSN 0953-4075, DOI https://doi.org/10.1088/1361-6455/ab08b0 <https://doi.org/10.1088/1361-6455/ab08b0>. https://doi.org/10.1088/1361-6455/ab08b0 doi:10.1088/1361-6455/ab08b0 |
| spellingShingle | Q Science (General) QC Physics Ooi, Chong Heng Raymond Liu, Wu Ming Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity |
| title | Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity |
| title_full | Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity |
| title_fullStr | Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity |
| title_full_unstemmed | Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity |
| title_short | Molecular Bose–Einstein condensates: effects of molecular rotations on transition temperature and heat capacity |
| title_sort | molecular bose einstein condensates effects of molecular rotations on transition temperature and heat capacity |
| topic | Q Science (General) QC Physics |
| work_keys_str_mv | AT ooichonghengraymond molecularboseeinsteincondensateseffectsofmolecularrotationsontransitiontemperatureandheatcapacity AT liuwuming molecularboseeinsteincondensateseffectsofmolecularrotationsontransitiontemperatureandheatcapacity |