Measurement of geometric phase for mixed states using single photon interferometry

被引：80

作者：

Ericsson, M ^{[1
]}

Achilles, D ^{[1
]}

Barreiro, JT ^{[1
]}

Branning, D ^{[1
]}

Peters, NA ^{[1
]}

Kwiat, PG ^{[1
]}

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.94.050401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Geometric phase may enable inherently fault-tolerant quantum computation. However, due to potential decoherence effects, it is important to understand how such phases arise for mixed input states. We report the first experiment to measure mixed-state geometric phases in optics, using a Mach-Zehnder interferometer, and polarization mixed states that are produced in two different ways: decohering pure states with birefringent elements; and producing a nonmaximally entangled state of two photons and tracing over one of them, a form of remote state preparation.

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页数：4

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