Indirect methods to control population distribution in a large spin system
We demonstrate how a large spin system ( $S=7/2$ ) with the ground and first excited state separated by a seven-photon transition exhibits nonequilibrium thermodynamic properties and how the population distribution may be manipulated using coupling between energy levels. The first method involves no...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aa5fdd |
| _version_ | 1797750846508761088 |
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| author | Lingfei Zhao Maxim Goryachev Jeremy Bourhill Michael E Tobar |
| author_facet | Lingfei Zhao Maxim Goryachev Jeremy Bourhill Michael E Tobar |
| author_sort | Lingfei Zhao |
| collection | DOAJ |
| description | We demonstrate how a large spin system ( $S=7/2$ ) with the ground and first excited state separated by a seven-photon transition exhibits nonequilibrium thermodynamic properties and how the population distribution may be manipulated using coupling between energy levels. The first method involves non-adiabatic passage through an avoided level crossing controlled with an external DC magnetic field and the resulting Landau–Zener transition. The second method is based on external cavity pumping to a higher energy state hybridised with another state that is two single-photon transitions away from the ground state. The results are confirmed experimentally with a Gd ^3+ impurity ion ensemble in a YVO _4 crystal cooled to 20 mK, which also acts as a microwave photonic whispering gallery mode resonator. Extremely long lifetimes are observed due to the large number of photons required for the transition between the ground and first excited states. |
| first_indexed | 2024-03-12T16:39:47Z |
| format | Article |
| id | doaj.art-b3580d1057d84688accc5409d90b9354 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:39:47Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-b3580d1057d84688accc5409d90b93542023-08-08T14:36:10ZengIOP PublishingNew Journal of Physics1367-26302017-01-0119303301610.1088/1367-2630/aa5fddIndirect methods to control population distribution in a large spin systemLingfei Zhao0Maxim Goryachev1https://orcid.org/0000-0002-0257-4054Jeremy Bourhill2Michael E Tobar3Department of Physics, Nanjing University , Nanjing 210093, People's Republic of ChinaARC Centre of Excellence for Engineered Quantum Systems, University of Western Australia , 35 Stirling Highway, Crawley WA 6009, AustraliaARC Centre of Excellence for Engineered Quantum Systems, University of Western Australia , 35 Stirling Highway, Crawley WA 6009, AustraliaARC Centre of Excellence for Engineered Quantum Systems, University of Western Australia , 35 Stirling Highway, Crawley WA 6009, AustraliaWe demonstrate how a large spin system ( $S=7/2$ ) with the ground and first excited state separated by a seven-photon transition exhibits nonequilibrium thermodynamic properties and how the population distribution may be manipulated using coupling between energy levels. The first method involves non-adiabatic passage through an avoided level crossing controlled with an external DC magnetic field and the resulting Landau–Zener transition. The second method is based on external cavity pumping to a higher energy state hybridised with another state that is two single-photon transitions away from the ground state. The results are confirmed experimentally with a Gd ^3+ impurity ion ensemble in a YVO _4 crystal cooled to 20 mK, which also acts as a microwave photonic whispering gallery mode resonator. Extremely long lifetimes are observed due to the large number of photons required for the transition between the ground and first excited states.https://doi.org/10.1088/1367-2630/aa5fddspins in solidslarge spin systemwhispering gallery modeLandau–Zener transition |
| spellingShingle | Lingfei Zhao Maxim Goryachev Jeremy Bourhill Michael E Tobar Indirect methods to control population distribution in a large spin system New Journal of Physics spins in solids large spin system whispering gallery mode Landau–Zener transition |
| title | Indirect methods to control population distribution in a large spin system |
| title_full | Indirect methods to control population distribution in a large spin system |
| title_fullStr | Indirect methods to control population distribution in a large spin system |
| title_full_unstemmed | Indirect methods to control population distribution in a large spin system |
| title_short | Indirect methods to control population distribution in a large spin system |
| title_sort | indirect methods to control population distribution in a large spin system |
| topic | spins in solids large spin system whispering gallery mode Landau–Zener transition |
| url | https://doi.org/10.1088/1367-2630/aa5fdd |
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