Entanglement of a photon and a collective atomic excitation -: art. no. 040405

被引：162

作者：

Matsukevich, DN ^{[1
]}

Chanelière, T ^{[1
]}

Bhattacharya, M ^{[1
]}

Lan, SY ^{[1
]}

Jenkins, SD ^{[1
]}

Kennedy, TAB ^{[1
]}

Kuzmich, A ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.95.040405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe a new experimental approach to probabilistic atom-photon (signal) entanglement. Two qubit states are encoded as orthogonal collective spin excitations of an unpolarized atomic ensemble. After a programmable delay, the atomic excitation is converted into a photon (idler). Polarization states of both the signal and the idler are recorded and are found to be in violation of the Bell inequality. Atomic coherence times exceeding several microseconds are achieved by switching off all the trapping fields-including the quadrupole magnetic field of the magneto-optical trap-and zeroing out the residual ambient magnetic field.

引用

页数：4

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