Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman Field
The speed of the Goldstone sound mode of a spin-orbit-coupled atomic Fermi gas loaded in a square optical lattice with a non-Abelian gauge field in the presence of a Zeeman field is calculated within the Gaussian approximation and from the Bethe-Salpeter equation in the generalized random phase appr...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2018/6809265 |
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| _version_ | 1832552616211513344 |
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| author | Zlatko Koinov Israel Chávez Villalpando |
| author_facet | Zlatko Koinov Israel Chávez Villalpando |
| author_sort | Zlatko Koinov |
| collection | DOAJ |
| description | The speed of the Goldstone sound mode of a spin-orbit-coupled atomic Fermi gas loaded in a square optical lattice with a non-Abelian gauge field in the presence of a Zeeman field is calculated within the Gaussian approximation and from the Bethe-Salpeter equation in the generalized random phase approximation. It is found that (i) there is no sharp change of the slope of the Goldstone sound mode across the topological quantum phase transition point and (ii) the Gaussian approximation significantly overestimates the speed of sound of the Goldstone mode compared to the value provided by the BS formalism. |
| format | Article |
| id | doaj-art-0d4018980abf4e14966f005eede3594b |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-0d4018980abf4e14966f005eede3594b2025-02-03T05:58:12ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242018-01-01201810.1155/2018/68092656809265Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman FieldZlatko Koinov0Israel Chávez Villalpando1Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, USAInstituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 20-364, 01000 Mexico Distrito Federal, MexicoThe speed of the Goldstone sound mode of a spin-orbit-coupled atomic Fermi gas loaded in a square optical lattice with a non-Abelian gauge field in the presence of a Zeeman field is calculated within the Gaussian approximation and from the Bethe-Salpeter equation in the generalized random phase approximation. It is found that (i) there is no sharp change of the slope of the Goldstone sound mode across the topological quantum phase transition point and (ii) the Gaussian approximation significantly overestimates the speed of sound of the Goldstone mode compared to the value provided by the BS formalism.http://dx.doi.org/10.1155/2018/6809265 |
| spellingShingle | Zlatko Koinov Israel Chávez Villalpando Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman Field Advances in Condensed Matter Physics |
| title | Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman Field |
| title_full | Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman Field |
| title_fullStr | Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman Field |
| title_full_unstemmed | Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman Field |
| title_short | Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman Field |
| title_sort | speed of the goldstone sound mode of an atomic fermi gas loaded on a square optical lattice with a non abelian gauge field in the presence of a zeeman field |
| url | http://dx.doi.org/10.1155/2018/6809265 |
| work_keys_str_mv | AT zlatkokoinov speedofthegoldstonesoundmodeofanatomicfermigasloadedonasquareopticallatticewithanonabeliangaugefieldinthepresenceofazeemanfield AT israelchavezvillalpando speedofthegoldstonesoundmodeofanatomicfermigasloadedonasquareopticallatticewithanonabeliangaugefieldinthepresenceofazeemanfield |