Persistent Quantum Beats and Long-Distance Entanglement from Waveguide-Mediated Interactions

被引：241

作者：

Zheng, Huaixiu ^{[1
]}

Baranger, Harold U. ^{[1
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.110.113601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study photon-photon correlations and entanglement generation in a one-dimensional waveguide coupled to two qubits with an arbitrary spatial separation. To treat the combination of nonlinear elements and 1D continuum, we develop a novel Green function method. The vacuum-mediated qubit-qubit interactions cause quantum beats to appear in the second-order correlation function. We go beyond the Markovian regime and observe that such quantum beats persist much longer than the qubit lifetime. A high degree of long-distance entanglement can be generated, increasing the potential of waveguide-QED systems for scalable quantum networking. DOI: 10.1103/PhysRevLett.110.113601

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页数：5

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