FROM PHOTON COUNTS TO QUANTUM PHASE

被引：86

作者：

FREYBERGER, M ^{[1
]}

VOGEL, K ^{[1
]}

SCHLEICH, WP ^{[1
]}

机构：

[1] MAX PLANCK INST QUANTUM OPT,W-8046 GARCHING,GERMANY

来源：

PHYSICS LETTERS A | 1993年 / 176卷 / 1-2期

关键词：

D O I：

10.1016/0375-9601(93)90313-O

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We derive an exact expression for the joint count probability in an eight-port homodyne detector. when the signal field is in an arbitrary state, the local oscillator is in a coherent state and the other two input states are the vacuum. In the limit of a strong local oscillator this photon count statistics is the scaled Q-function of the signal state. The phase distribution corresponding to this measurement scheme is then the Q-function of the signal field integrated over radius. The physical reason for the Q-function lies in the simultaneous measurement of two two-mode operators. We discuss the dependence of the photon count statistics on the local oscillator intensity using the example of a one-photon Fock state.

引用

页码：41 / 46

页数：6

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