Signal velocity, causality, and quantum noise in superluminal light pulse propagation

被引：168

作者：

Kuzmich, A

Dogariu, A

Wang, LJ

Milonni, PW

Chiao, RY

机构：

[1] NEC Res Inst, Princeton, NJ 08540 USA

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[3] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.86.3925

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider pulse propagation in a linear anomalously dispersive medium where the group velocity exceeds the speed of light in vacuum (c) or even becomes negative. A signal velocity is defined operationally based on the optical signal-to-noise ratio, and is computed for cases appropriate to the recent experiment where such a negative group velocity was observed. It is found that quantum fluctuations limit the signal velocity to values less than c.

引用

页码：3925 / 3929

页数：5

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