Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium
While typical theories of atom–light interactions treat the atomic medium as being smooth, it is well-known that microscopic optical effects driven by atomic granularity, dipole–dipole interactions, and multiple scattering can lead to important effects. Recently, for example, it was experimentally o...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ac465d |
| _version_ | 1797748622616428544 |
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| author | S Grava Y He S Wu D E Chang |
| author_facet | S Grava Y He S Wu D E Chang |
| author_sort | S Grava |
| collection | DOAJ |
| description | While typical theories of atom–light interactions treat the atomic medium as being smooth, it is well-known that microscopic optical effects driven by atomic granularity, dipole–dipole interactions, and multiple scattering can lead to important effects. Recently, for example, it was experimentally observed that these ingredients can lead to a fundamental, density-dependent dephasing of optical spin waves in a disordered atomic medium. Here, we go beyond the short-time and dilute limits considered previously, to develop a comprehensive theory of dephasing dynamics for arbitrary times and atomic densities. In particular, we develop a novel, non-perturbative theory based on strong disorder renormalization group (RG), in order to quantitatively predict the dominant role that near-field optical interactions between nearby neighbors has in driving the dephasing process. This theory also enables one to capture the key features of the many-atom dephasing dynamics in terms of an effective single-atom model. These results should shed light on the limits imposed by near-field interactions on quantum optical phenomena in dense atomic media, and illustrate the promise of strong disorder RG as a method of dealing with complex microscopic optical phenomena in such systems. |
| first_indexed | 2024-03-12T16:08:22Z |
| format | Article |
| id | doaj.art-4bdda136549a4bb88ba7f72b73ff7aa6 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:08:22Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-4bdda136549a4bb88ba7f72b73ff7aa62023-08-09T14:15:08ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124101303110.1088/1367-2630/ac465dRenormalization group analysis of near-field induced dephasing of optical spin waves in an atomic mediumS Grava0https://orcid.org/0000-0002-9719-3843Y He1S Wu2D E Chang3ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , Castelldefels (Barcelona) 08860, Spain; ICREA-Institució Catalana de Recerca i Estudis Avançats , 08015 Barcelona, SpainDepartment of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University , Shanghai 200433, People’s Republic of ChinaDepartment of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University , Shanghai 200433, People’s Republic of ChinaICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , Castelldefels (Barcelona) 08860, Spain; ICREA-Institució Catalana de Recerca i Estudis Avançats , 08015 Barcelona, SpainWhile typical theories of atom–light interactions treat the atomic medium as being smooth, it is well-known that microscopic optical effects driven by atomic granularity, dipole–dipole interactions, and multiple scattering can lead to important effects. Recently, for example, it was experimentally observed that these ingredients can lead to a fundamental, density-dependent dephasing of optical spin waves in a disordered atomic medium. Here, we go beyond the short-time and dilute limits considered previously, to develop a comprehensive theory of dephasing dynamics for arbitrary times and atomic densities. In particular, we develop a novel, non-perturbative theory based on strong disorder renormalization group (RG), in order to quantitatively predict the dominant role that near-field optical interactions between nearby neighbors has in driving the dephasing process. This theory also enables one to capture the key features of the many-atom dephasing dynamics in terms of an effective single-atom model. These results should shed light on the limits imposed by near-field interactions on quantum optical phenomena in dense atomic media, and illustrate the promise of strong disorder RG as a method of dealing with complex microscopic optical phenomena in such systems.https://doi.org/10.1088/1367-2630/ac465datomic physicsquantum physicsdephasingrenormalization group |
| spellingShingle | S Grava Y He S Wu D E Chang Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium New Journal of Physics atomic physics quantum physics dephasing renormalization group |
| title | Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium |
| title_full | Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium |
| title_fullStr | Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium |
| title_full_unstemmed | Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium |
| title_short | Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium |
| title_sort | renormalization group analysis of near field induced dephasing of optical spin waves in an atomic medium |
| topic | atomic physics quantum physics dephasing renormalization group |
| url | https://doi.org/10.1088/1367-2630/ac465d |
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