Arbitrary precision in multipath interferometry

被引：32

作者：

DAriano, GM

Paris, MGA

机构：

[1] Istituto Nazionale di Fisica della Materia, Sezione di Pavia, Pavia, I-27100

来源：

PHYSICAL REVIEW A | 1997年 / 55卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.55.2267

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Interferometers with M paths are studied. It is shown that the accuracy of the phase-shift measurement can be improved by increasing the number of paths. For a detection scheme that uses coherent input states, phase sensitivity rescales as Delta phi proportional to M(-1). and nonunit quantum efficiency eta at detectors only decreases the effective M by a factor root pi.

引用

页码：2267 / 2271

页数：5

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