What does a quantum eraser really erase?

被引：4

作者：

Kwiat, PG ^{[1
]}

Schwindt, PDD ^{[1
]}

Englert, BG ^{[1
]}

机构：

[1] Univ Calif Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA

来源：

MYSTERIES, PUZZLES, AND PARADOXES IN QUANTUM MECHANICS | 1999年 / 461卷

关键词：

D O I：

10.1063/1.57889

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Interference may occur whenever there are two or more paths or processes leading to the same final outcome, and these are in principle indistinguishable. If one of these paths becomes labeled, yielding "which-path" information, interference will vanish. However, an appropriate measurement that "erases" the distinguishability may recover interference. Remarkably,, it can be recovered even in situations where there was no which-path information to erase! Using single photons in a modified Mach-Zehnder interferometer, we have investigated the various conditions that allow, prevent, and recover interference, for a variety of pure, mixed, and partially-mixed input states.

引用

页码：69 / 80

页数：12

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