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Clock frequency estimation under spontaneous emission |
Xi-Zhou Qin (秦锡洲)1, Jia-Hao Huang (黄嘉豪)1, Hong-Hua Zhong (钟宏华)1, Chaohong Lee (李朝红)1,2( ) |
1. TianQin Research Center & School of Physics and Astronomy, Sun Yat-Sen University (Zhuhai Campus), Zhuhai 519082, China
2. Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University (Guangzhou Campus), Guangzhou 510275, China |
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Abstract We investigate the quantum dynamics of a driven two-level system under spontaneous emission and its application in clock frequency estimation. By using the Lindblad equation to describe the system, we analytically obtain its exact solutions, which show three different regimes: Rabi oscillation, damped oscillation, and overdamped decay. From the analytical solutions, we explore how the spontaneous emission affects the clock frequency estimation. We find that under a moderate spontaneous emission rate, the transition frequency can still be inferred from the Rabi oscillation. Our results enable potential practical applications in frequency measurement and quantum control under decoherence.
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| Keywords
clock frequency estimation
two-level system
spontaneous emission
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Corresponding Author(s):
Chaohong Lee (李朝红)
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Issue Date: 07 September 2017
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