Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
In the presence of strong dephasing noise the dynamics of Rydberg gases becomes effectively classical, due to the rapid decay of quantum superpositions between atomic levels. Recently a great deal of attention has been devoted to the stochastic dynamics that emerges in that limit, revealing several...
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Institute of Physics
2016
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| Online Access: | https://eprints.nottingham.ac.uk/36330/ |
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| author | Levi, Emanuele Gutierrez, Ricardo Lesanovsky, Igor |
| author_facet | Levi, Emanuele Gutierrez, Ricardo Lesanovsky, Igor |
| author_sort | Levi, Emanuele |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | In the presence of strong dephasing noise the dynamics of Rydberg gases becomes effectively classical, due to the rapid decay of quantum superpositions between atomic levels. Recently a great deal of attention has been devoted to the stochastic dynamics that emerges in that limit, revealing several interesting features, including kinetically constrained glassy behaviour, self-similarity and aggregation effects. However, the non-equilibrium physics of these systems, in particular in the regime where coherent and dissipative processes contribute on equal footing, is yet far from being understood. To explore this we study the dynamics of a small one-dimensional Rydberg lattice gas subject to dephasing noise by numerically integrating the quantum master equation. We interpolate between the coherent and the strongly dephased regime by defining a generalised concept of a blockade length. We find indications that the main features observed in the strongly dissipative limit persist when the dissipation is not strong enough to annihilate quantum coherences at the dynamically relevant time scales. These features include the existence of a time-dependent Rydberg blockade radius, and a growth of the density of excitations which is compatible with the power-law behaviour expected in the classical limit. |
| first_indexed | 2025-11-14T19:29:21Z |
| format | Article |
| id | nottingham-36330 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:29:21Z |
| publishDate | 2016 |
| publisher | Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-363302020-05-04T18:13:42Z https://eprints.nottingham.ac.uk/36330/ Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths Levi, Emanuele Gutierrez, Ricardo Lesanovsky, Igor In the presence of strong dephasing noise the dynamics of Rydberg gases becomes effectively classical, due to the rapid decay of quantum superpositions between atomic levels. Recently a great deal of attention has been devoted to the stochastic dynamics that emerges in that limit, revealing several interesting features, including kinetically constrained glassy behaviour, self-similarity and aggregation effects. However, the non-equilibrium physics of these systems, in particular in the regime where coherent and dissipative processes contribute on equal footing, is yet far from being understood. To explore this we study the dynamics of a small one-dimensional Rydberg lattice gas subject to dephasing noise by numerically integrating the quantum master equation. We interpolate between the coherent and the strongly dephased regime by defining a generalised concept of a blockade length. We find indications that the main features observed in the strongly dissipative limit persist when the dissipation is not strong enough to annihilate quantum coherences at the dynamically relevant time scales. These features include the existence of a time-dependent Rydberg blockade radius, and a growth of the density of excitations which is compatible with the power-law behaviour expected in the classical limit. Institute of Physics 2016-09-05 Article PeerReviewed Levi, Emanuele, Gutierrez, Ricardo and Lesanovsky, Igor (2016) Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths. Journal of Physics B: Atomic, Molecular and Optical Physics, 49 (18). 184003/1-184003/8. ISSN 1361-6455 Rydberg blockade non-equilibrium dissipation dephasing http://iopscience.iop.org/article/10.1088/0953-4075/49/18/184003/meta doi:10.1088/0953-4075/49/18/184003 doi:10.1088/0953-4075/49/18/184003 |
| spellingShingle | Rydberg blockade non-equilibrium dissipation dephasing Levi, Emanuele Gutierrez, Ricardo Lesanovsky, Igor Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths |
| title | Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths |
| title_full | Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths |
| title_fullStr | Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths |
| title_full_unstemmed | Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths |
| title_short | Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths |
| title_sort | quantum non-equilibrium dynamics of rydberg gases in the presence of dephasing noise of different strengths |
| topic | Rydberg blockade non-equilibrium dissipation dephasing |
| url | https://eprints.nottingham.ac.uk/36330/ https://eprints.nottingham.ac.uk/36330/ https://eprints.nottingham.ac.uk/36330/ |