Topological properties of a dense atomic lattice gas
We investigate the existence of topological phases in a dense two-dimensional atomic lattice gas. The coupling of the atoms to the radiation field gives rise to dissipation and a non-trivial coherent long-range exchange interaction whose form goes beyond a simple power-law. The far-field terms of th...
| Main Authors: | , , , , |
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| Format: | Article |
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American Physical Society
2017
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| Online Access: | https://eprints.nottingham.ac.uk/46794/ |
| _version_ | 1848797401726320640 |
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| author | Bettles, Robert J. Minář, Jiří Adams, Charles S. Lesanovsky, Igor Olmos, Beatriz |
| author_facet | Bettles, Robert J. Minář, Jiří Adams, Charles S. Lesanovsky, Igor Olmos, Beatriz |
| author_sort | Bettles, Robert J. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We investigate the existence of topological phases in a dense two-dimensional atomic lattice gas. The coupling of the atoms to the radiation field gives rise to dissipation and a non-trivial coherent long-range exchange interaction whose form goes beyond a simple power-law. The far-field terms of the potential -- which are particularly relevant for atomic separations comparable to the atomic transition wavelength -- can give rise to energy spectra with one-sided divergences in the Brillouin zone. The long-ranged character of the interactions has another important consequence: it can break the standard bulk-boundary relation in topological insulators. We show that topological properties such as the transport of an excitation along the edge of the lattice are robust with respect to the presence of lattice defects and dissipation. The latter is of particular relevance as dissipation and coherent interactions are inevitably connected in our setting. |
| first_indexed | 2025-11-14T20:03:18Z |
| format | Article |
| id | nottingham-46794 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:03:18Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-467942020-05-04T19:12:01Z https://eprints.nottingham.ac.uk/46794/ Topological properties of a dense atomic lattice gas Bettles, Robert J. Minář, Jiří Adams, Charles S. Lesanovsky, Igor Olmos, Beatriz We investigate the existence of topological phases in a dense two-dimensional atomic lattice gas. The coupling of the atoms to the radiation field gives rise to dissipation and a non-trivial coherent long-range exchange interaction whose form goes beyond a simple power-law. The far-field terms of the potential -- which are particularly relevant for atomic separations comparable to the atomic transition wavelength -- can give rise to energy spectra with one-sided divergences in the Brillouin zone. The long-ranged character of the interactions has another important consequence: it can break the standard bulk-boundary relation in topological insulators. We show that topological properties such as the transport of an excitation along the edge of the lattice are robust with respect to the presence of lattice defects and dissipation. The latter is of particular relevance as dissipation and coherent interactions are inevitably connected in our setting. American Physical Society 2017-10-10 Article PeerReviewed Bettles, Robert J., Minář, Jiří, Adams, Charles S., Lesanovsky, Igor and Olmos, Beatriz (2017) Topological properties of a dense atomic lattice gas. Physical Review A, 96 (4). 041603/1-041603/6. ISSN 2469-9934 https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.041603 doi:10.1103/PhysRevA.96.041603 doi:10.1103/PhysRevA.96.041603 |
| spellingShingle | Bettles, Robert J. Minář, Jiří Adams, Charles S. Lesanovsky, Igor Olmos, Beatriz Topological properties of a dense atomic lattice gas |
| title | Topological properties of a dense atomic lattice gas |
| title_full | Topological properties of a dense atomic lattice gas |
| title_fullStr | Topological properties of a dense atomic lattice gas |
| title_full_unstemmed | Topological properties of a dense atomic lattice gas |
| title_short | Topological properties of a dense atomic lattice gas |
| title_sort | topological properties of a dense atomic lattice gas |
| url | https://eprints.nottingham.ac.uk/46794/ https://eprints.nottingham.ac.uk/46794/ https://eprints.nottingham.ac.uk/46794/ |