中国物理B ›› 1999, Vol. 8 ›› Issue (6): 437-442.doi: 10.1088/1004-423X/8/6/007
张俊香, 张天才, 谢常德, 彭堃墀
Zhang Jun-xiang (张俊香), Zhang Tian-cai (张天才), Xie Chang-de (谢常德), Peng Kun-chi (彭堃墀)
摘要: An interferometric detection scheme to measure optical phase shift with sensi tivity beyond the shot noise limit is proposed. The theoretical calculation shows that using the quantum correlated twin beams produced from an optical parametric amplifier as the input fields of a Mach-Zehnder interferometer, the minimum detectable phase shift will exceed the shot noise limit N-1/2 and approach the Heisenberg limit N-1. The parametric dependences of the minimum detectable phase shift on the nonlinear interaction, input photon number, and detection efficiency are shown.
中图分类号: (Optical parametric oscillators and amplifiers)