Nearly critical superfluid: effective field theory and holography
Abstract We study a nearly critical superfluid system from two complementary approaches. Within the first approach, we formulate a Schwinger-Keldysh effective field theory (EFT) for the system when it is located slightly above the critical temperature. The dynamical variables in the EFT construction...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-07-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP07(2024)104 |
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| author | Yanyan Bu Hongfei Gao Xin Gao Zhiwei Li |
| author_facet | Yanyan Bu Hongfei Gao Xin Gao Zhiwei Li |
| author_sort | Yanyan Bu |
| collection | DOAJ |
| description | Abstract We study a nearly critical superfluid system from two complementary approaches. Within the first approach, we formulate a Schwinger-Keldysh effective field theory (EFT) for the system when it is located slightly above the critical temperature. The dynamical variables in the EFT construction are two scalars: a neutral scalar associated with the conserved U(1) charge, and a complex scalar describing the order parameter. The set of symmetries, particularly the dynamical Kubo-Martin-Schwinger (KMS) symmetry and chemical shift symmetry, strictly constrains the form of EFT action. Within the second approach, using the holographic Schwinger-Keldysh technique, we derive the effective action for a “microscopic” holographic superfluid, confirming the EFT construction. A systematic inclusion of non-Gaussianity is one highlight of present study. |
| format | Article |
| id | doaj-art-b8c84e22bdb24be3bef49d7d143d36a1 |
| institution | OA Journals |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-b8c84e22bdb24be3bef49d7d143d36a12025-08-20T02:11:28ZengSpringerOpenJournal of High Energy Physics1029-84792024-07-012024713510.1007/JHEP07(2024)104Nearly critical superfluid: effective field theory and holographyYanyan Bu0Hongfei Gao1Xin Gao2Zhiwei Li3School of Physics, Harbin Institute of TechnologyCollege of Physics, Sichuan UniversityCollege of Physics, Sichuan UniversityCollege of Physics, Sichuan UniversityAbstract We study a nearly critical superfluid system from two complementary approaches. Within the first approach, we formulate a Schwinger-Keldysh effective field theory (EFT) for the system when it is located slightly above the critical temperature. The dynamical variables in the EFT construction are two scalars: a neutral scalar associated with the conserved U(1) charge, and a complex scalar describing the order parameter. The set of symmetries, particularly the dynamical Kubo-Martin-Schwinger (KMS) symmetry and chemical shift symmetry, strictly constrains the form of EFT action. Within the second approach, using the holographic Schwinger-Keldysh technique, we derive the effective action for a “microscopic” holographic superfluid, confirming the EFT construction. A systematic inclusion of non-Gaussianity is one highlight of present study.https://doi.org/10.1007/JHEP07(2024)104AdS-CFT CorrespondenceHolography and Hydrodynamics |
| spellingShingle | Yanyan Bu Hongfei Gao Xin Gao Zhiwei Li Nearly critical superfluid: effective field theory and holography Journal of High Energy Physics AdS-CFT Correspondence Holography and Hydrodynamics |
| title | Nearly critical superfluid: effective field theory and holography |
| title_full | Nearly critical superfluid: effective field theory and holography |
| title_fullStr | Nearly critical superfluid: effective field theory and holography |
| title_full_unstemmed | Nearly critical superfluid: effective field theory and holography |
| title_short | Nearly critical superfluid: effective field theory and holography |
| title_sort | nearly critical superfluid effective field theory and holography |
| topic | AdS-CFT Correspondence Holography and Hydrodynamics |
| url | https://doi.org/10.1007/JHEP07(2024)104 |
| work_keys_str_mv | AT yanyanbu nearlycriticalsuperfluideffectivefieldtheoryandholography AT hongfeigao nearlycriticalsuperfluideffectivefieldtheoryandholography AT xingao nearlycriticalsuperfluideffectivefieldtheoryandholography AT zhiweili nearlycriticalsuperfluideffectivefieldtheoryandholography |