Polaron physics in optical lattices
We investigate the effects of a nearly uniform Bose-Einstein condensate (BEC) on the properties of immersed trapped impurity atoms. Using a weak-coupling expansion in the BEC-impurity interaction strength, we derive a model describing polarons, i.e., impurities dressed by a coherent state of Bogoliu...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2007
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| _version_ | 1797082396502261760 |
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| author | Bruderer, M Klein, A Clark, SR Jaksch, D |
| author_facet | Bruderer, M Klein, A Clark, SR Jaksch, D |
| author_sort | Bruderer, M |
| collection | OXFORD |
| description | We investigate the effects of a nearly uniform Bose-Einstein condensate (BEC) on the properties of immersed trapped impurity atoms. Using a weak-coupling expansion in the BEC-impurity interaction strength, we derive a model describing polarons, i.e., impurities dressed by a coherent state of Bogoliubov phonons, and apply it to ultracold bosonic atoms in an optical lattice. We show that, with increasing BEC temperature, the transport properties of the impurities change from coherent to diffusive. Furthermore, stable polaron clusters are formed via a phonon-mediated off-site attraction. © 2007 The American Physical Society. |
| first_indexed | 2024-03-07T01:27:34Z |
| format | Journal article |
| id | oxford-uuid:927da380-4bd9-4c0b-b34c-715f4dad1043 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:27:34Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:927da380-4bd9-4c0b-b34c-715f4dad10432022-03-26T23:25:57ZPolaron physics in optical latticesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:927da380-4bd9-4c0b-b34c-715f4dad1043EnglishSymplectic Elements at Oxford2007Bruderer, MKlein, AClark, SRJaksch, DWe investigate the effects of a nearly uniform Bose-Einstein condensate (BEC) on the properties of immersed trapped impurity atoms. Using a weak-coupling expansion in the BEC-impurity interaction strength, we derive a model describing polarons, i.e., impurities dressed by a coherent state of Bogoliubov phonons, and apply it to ultracold bosonic atoms in an optical lattice. We show that, with increasing BEC temperature, the transport properties of the impurities change from coherent to diffusive. Furthermore, stable polaron clusters are formed via a phonon-mediated off-site attraction. © 2007 The American Physical Society. |
| spellingShingle | Bruderer, M Klein, A Clark, SR Jaksch, D Polaron physics in optical lattices |
| title | Polaron physics in optical lattices |
| title_full | Polaron physics in optical lattices |
| title_fullStr | Polaron physics in optical lattices |
| title_full_unstemmed | Polaron physics in optical lattices |
| title_short | Polaron physics in optical lattices |
| title_sort | polaron physics in optical lattices |
| work_keys_str_mv | AT brudererm polaronphysicsinopticallattices AT kleina polaronphysicsinopticallattices AT clarksr polaronphysicsinopticallattices AT jakschd polaronphysicsinopticallattices |