Phase transitions in electron spin resonance under continuous microwave driving
We study an ensemble of strongly coupled electrons under continuous microwave irradiation interacting with a dissipative environment, a problem of relevance to the creation of highly polarized non-equilibrium states in nuclear magnetic resonance. We analyze the stationary states of the dynamics, de...
| 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/45579/ |
| _version_ | 1848797159015579648 |
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| author | Karabanov, Alexander Rose, Dominic C. Köckenberger, Walter Garrahan, Juan P. Lesanovsky, Igor |
| author_facet | Karabanov, Alexander Rose, Dominic C. Köckenberger, Walter Garrahan, Juan P. Lesanovsky, Igor |
| author_sort | Karabanov, Alexander |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We study an ensemble of strongly coupled electrons under continuous microwave irradiation interacting with a dissipative environment, a problem of relevance to the creation of highly polarized non-equilibrium states
in nuclear magnetic resonance. We analyze the stationary states of the dynamics, described within a Lindblad master equation framework, at the mean-field approximation level. This approach allows us to identify steady state phase transitions between phases of high and low polarization controlled by the distribution of disordered electronic interactions. We compare the mean-field predictions to numerically exact simulations of small systems and find good agreement. Our study highlights the possibility of observing collective phenomena, such as metastable states, phase transitions and critical behaviour in appropriately designed paramagnetic systems. These phenomena occur in a low-temperature regime which is not theoretically tractable by conventional methods, e.g., the spin-temperature approach. |
| first_indexed | 2025-11-14T19:59:26Z |
| format | Article |
| id | nottingham-45579 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:59:26Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-455792020-05-04T19:11:40Z https://eprints.nottingham.ac.uk/45579/ Phase transitions in electron spin resonance under continuous microwave driving Karabanov, Alexander Rose, Dominic C. Köckenberger, Walter Garrahan, Juan P. Lesanovsky, Igor We study an ensemble of strongly coupled electrons under continuous microwave irradiation interacting with a dissipative environment, a problem of relevance to the creation of highly polarized non-equilibrium states in nuclear magnetic resonance. We analyze the stationary states of the dynamics, described within a Lindblad master equation framework, at the mean-field approximation level. This approach allows us to identify steady state phase transitions between phases of high and low polarization controlled by the distribution of disordered electronic interactions. We compare the mean-field predictions to numerically exact simulations of small systems and find good agreement. Our study highlights the possibility of observing collective phenomena, such as metastable states, phase transitions and critical behaviour in appropriately designed paramagnetic systems. These phenomena occur in a low-temperature regime which is not theoretically tractable by conventional methods, e.g., the spin-temperature approach. American Physical Society 2017-10-11 Article PeerReviewed Karabanov, Alexander, Rose, Dominic C., Köckenberger, Walter, Garrahan, Juan P. and Lesanovsky, Igor (2017) Phase transitions in electron spin resonance under continuous microwave driving. Physical Review Letters, 119 . p. 150402. ISSN 1079-7114 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.150402 doi:10.1103/PhysRevLett.119.150402 doi:10.1103/PhysRevLett.119.150402 |
| spellingShingle | Karabanov, Alexander Rose, Dominic C. Köckenberger, Walter Garrahan, Juan P. Lesanovsky, Igor Phase transitions in electron spin resonance under continuous microwave driving |
| title | Phase transitions in electron spin resonance under continuous microwave driving |
| title_full | Phase transitions in electron spin resonance under continuous microwave driving |
| title_fullStr | Phase transitions in electron spin resonance under continuous microwave driving |
| title_full_unstemmed | Phase transitions in electron spin resonance under continuous microwave driving |
| title_short | Phase transitions in electron spin resonance under continuous microwave driving |
| title_sort | phase transitions in electron spin resonance under continuous microwave driving |
| url | https://eprints.nottingham.ac.uk/45579/ https://eprints.nottingham.ac.uk/45579/ https://eprints.nottingham.ac.uk/45579/ |