Measures of Quantum Synchronization in Continuous Variable Systems

被引：239

作者：

Mari, A. ^{[1
,2
]}

Farace, A. ^{[1
,2
]}

Didier, N. ^{[3
,4
]}

Giovannetti, V. ^{[1
,2
]}

Fazio, R. ^{[1
,2
]}

机构：

[1] Scuola Normale Super Pisa, NEST, I-56127 Pisa, Italy

[2] CNR, Ist Nanosci, I-56127 Pisa, Italy

[3] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[4] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 10期

关键词：

COHERENT;

D O I：

10.1103/PhysRevLett.111.103605

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce and characterize two different measures which quantify the level of synchronization of coupled continuous variable quantum systems. The two measures allow us to extend to the quantum domain the notions of complete and phase synchronization. The Heisenberg principle sets a universal bound to complete synchronization. The measure of phase synchronization is, in principle, unbounded; however, in the absence of quantum resources (e. g., squeezing) the synchronization level is bounded below a certain threshold. We elucidate some interesting connections between entanglement and synchronization and, finally, discuss an application based on quantum optomechanical systems.

引用

页数：5

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