Loophole-free Bell test with one atom and less than one photon on average

被引：19
|
作者：
Sangouard, N. [1 ]
Bancal, J. -D. [1 ]
Gisin, N. [1 ]
Rosenfeld, W. [2 ]
Sekatski, P. [1 ]
Weber, M. [2 ]
Weinfurter, H. [2 ]
机构：
[1] Univ Geneva, Appl Phys Grp, CH-1211 Geneva 4, Switzerland
[2] Univ Munich, Fak Phys, DE-80799 Munich, Germany
来源：
PHYSICAL REVIEW A | 2011年 / 84卷 / 05期
关键词：
INEQUALITY; VIOLATION;
D O I：
10.1103/PhysRevA.84.052122
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We consider the entanglement between two internal states of a single atom and two photon number states describing either the vacuum or a single photon and thus containing, on average, less than one photon. We show that this intriguing entanglement can be characterized through substantial violations of a Bell inequality by performing homodyne detections on the optical mode. We present the experimental challenges that need to be overcome to pave the way toward a loophole-free Bell test.
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页数：5
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