The transition from quantum Zeno to anti-Zeno effects for a qubit in a cavity by varying the cavity frequency |
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Authors: | Xiufeng Cao Qing Ai Chang-Pu Sun Franco Nori |
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Affiliation: | a Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, China b Advanced Science Institute, RIKEN, Wako-shi 351-0198, Japan c Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China d Physics Department, The University of Michigan, Ann Arbor, MI 48109-1040, USA |
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Abstract: | We propose a strategy to demonstrate the transition from the quantum Zeno effect (QZE) to the anti-Zeno effect (AZE) using a superconducting qubit coupled to a transmission line cavity, by varying the central frequency of the cavity mode. Our results are obtained without the rotating wave approximation (RWA), and the initial state (a dressed state) is easy to prepare. Moreover, we find that in the presence of both qubit?s intrinsic bath and the cavity bath, the emergence of the QZE and the AZE behaviors relies not only on the match between the qubit energy-level-spacing and the central frequency of the cavity mode, but also on the coupling strength between the qubit and the cavity mode. |
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Keywords: | Quantum Zeno effect Anti-Zeno effect Qubit Cavity |
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