聊城大学学报（自然科学版）2018，Vol.31Issue(4)：77-82,110,7.DOI:10.19728/j.issn1672-6634.2018.04.014
基于宇称测量的热态和Fock态的相位估计方案
Phase Estimation with Thermal State and Fock State via Parity Detection
摘要
Abstract
In quantum precision based optical interferometer, the phase sensitivity crucially depends on the nature of the quantum state.We analytically prove when a Mach-Zehnder interferometer powered by a Fock state into one input port, a thermal state, a squeezed vacuum state or a squeezed thermal state with same average photon number at the other input, the same performances in the phase estimation via parity detection can be obtained for small phase shift.We analytically prove that the parity detection saturates the quantum Cramér-Rao bound.In addition, our results show that besides a coherent state, a thermal state is another useful high-intensity classical state for the phase estimation.关键词
量子精密测量/马赫-曾德尔干涉仪/宇称测量/自由热态/Fock态Key words
quantum precision/Mach-Zehnder interferometer/parity detection/thermal state/Fock state分类
数理科学引用本文复制引用
王帅,吴世臣,眭永兴..基于宇称测量的热态和Fock态的相位估计方案[J].聊城大学学报（自然科学版）,2018,31(4):77-82,110,7.基金项目
国家自然科学基金项目 (11404040) （11404040）
江苏省自然科学基金项目 (BK20140253) 资助 （BK20140253）
