Signatures for generalized macroscopic superpositions

被引：47

作者：

Cavalcanti, E. G. ^{[1
]}

Reid, M. D. ^{[1
]}

机构：

[1] Univ Queensland, Osservatorio Astrofis Arcetri, Ctr Excellence Quantum Atom Opt, Sch Phys Sci, St Lucia, Qld 4072, Australia

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.97.170405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We develop criteria sufficient to enable detection of macroscopic coherence where there are not just two macroscopically distinct outcomes for a pointer measurement, but rather a spread of outcomes over a macroscopic range. The criteria provide a means to distinguish a macroscopic quantum description from a microscopic one based on mixtures of microscopic superpositions of pointer-measurement eigenstates. The criteria are applied to Gaussian-squeezed and spin-entangled states.

引用

页数：4

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