Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise
We give a semiclassical analysis of the average photon number as well as photon number variance (Fano factor F) for a Josephson junction (JJ) embedded microwave cavity system, where the JJ is subject to a fluctuating (i.e., noisy) bias voltage with finite dc average. Through the ac Josephson effect,...
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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/45467/ |
| _version_ | 1848797137466294272 |
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| author | Wang, Hui Blencowe, M.P. Armour, A.D. Rimberg, A.J. |
| author_facet | Wang, Hui Blencowe, M.P. Armour, A.D. Rimberg, A.J. |
| author_sort | Wang, Hui |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We give a semiclassical analysis of the average photon number as well as photon number variance (Fano factor F) for a Josephson junction (JJ) embedded microwave cavity system, where the JJ is subject to a fluctuating (i.e., noisy) bias voltage with finite dc average. Through the ac Josephson effect, the dc voltage bias drives the effectively nonlinear microwave cavity mode into an amplitude squeezed state (F <1), as has been established previously [Armour et al., Phys. Rev. Lett. 111, 247001 (2013)], but bias noise acts to degrade this squeezing. We find that the sensitivity of the Fano factor to bias voltage noise depends qualitatively on which stable fixed point regime the system is in for the corresponding classical nonlinear steady-state dynamics. Furthermore, we show that the impact of voltage bias noise is most significant when the cavity is excited to states with large average photon number. |
| first_indexed | 2025-11-14T19:59:06Z |
| format | Article |
| id | nottingham-45467 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:59:06Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-454672024-08-15T15:23:47Z https://eprints.nottingham.ac.uk/45467/ Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise Wang, Hui Blencowe, M.P. Armour, A.D. Rimberg, A.J. We give a semiclassical analysis of the average photon number as well as photon number variance (Fano factor F) for a Josephson junction (JJ) embedded microwave cavity system, where the JJ is subject to a fluctuating (i.e., noisy) bias voltage with finite dc average. Through the ac Josephson effect, the dc voltage bias drives the effectively nonlinear microwave cavity mode into an amplitude squeezed state (F <1), as has been established previously [Armour et al., Phys. Rev. Lett. 111, 247001 (2013)], but bias noise acts to degrade this squeezing. We find that the sensitivity of the Fano factor to bias voltage noise depends qualitatively on which stable fixed point regime the system is in for the corresponding classical nonlinear steady-state dynamics. Furthermore, we show that the impact of voltage bias noise is most significant when the cavity is excited to states with large average photon number. American Physical Society 2017-09-05 Article PeerReviewed Wang, Hui, Blencowe, M.P., Armour, A.D. and Rimberg, A.J. (2017) Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise. Physical Review B, 96 (10). p. 104503. ISSN 2469-9969 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.104503 doi:10.1103/PhysRevB.96.104503 doi:10.1103/PhysRevB.96.104503 |
| spellingShingle | Wang, Hui Blencowe, M.P. Armour, A.D. Rimberg, A.J. Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise |
| title | Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise |
| title_full | Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise |
| title_fullStr | Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise |
| title_full_unstemmed | Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise |
| title_short | Quantum dynamics of a Josephson junction driven cavity mode system in the presence of voltage bias noise |
| title_sort | quantum dynamics of a josephson junction driven cavity mode system in the presence of voltage bias noise |
| url | https://eprints.nottingham.ac.uk/45467/ https://eprints.nottingham.ac.uk/45467/ https://eprints.nottingham.ac.uk/45467/ |