Journal of Terahertz Science and Electronic Information Technology , Volume. 18, Issue 6, 1010(2020)
Optimal estimation and tracking of coherent state phase
In the traditional quantum phase tracking method, the output results are usually linearized, which has a strict limit on the local oscillator phase and signal phase, therefore, it is not applicable to the angle measurement by interferometry. In this paper, the quantum homodyne output is transformed and an iterative algorithm for maximum likelihood estimation is designed to realize the coherent state phase tracking. The Fisher information matrix is calculated to show that the proposed method can reach the quantum Cramer-Rao bound theoretically and has the best estimation.
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XU Han, CHEN Shuxin, WU Hao, HONG Lei, CUI Junhui. Optimal estimation and tracking of coherent state phase[J]. Journal of Terahertz Science and Electronic Information Technology , 2020, 18(6): 1010
Received: May. 22, 2019
Accepted: --
Published Online: Apr. 20, 2021
The Author Email: Hao WU (wuhaostudy@163.com)