Entangled Fock states for robust quantum optical metrology, imaging, and sensing

被引:209
|
作者
Huver, Sean D. [1 ]
Wildfeuer, Christoph F. [1 ]
Dowling, Jonathan P. [1 ]
机构
[1] Louisiana State Univ, Dept Phys & Astron, Hearne Inst Theoret Phys, Baton Rouge, LA 70803 USA
来源
PHYSICAL REVIEW A | 2008年 / 78卷 / 06期
关键词
Mach-Zehnder interferometers; matrix algebra; optical beam splitters; optical images; optical losses; optical testing; quantum entanglement; quantum optics;
D O I
10.1103/PhysRevA.78.063828
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We propose a class of path-entangled photon Fock states for robust quantum optical metrology, imaging, and sensing in the presence of loss. We model propagation loss with beam splitters and derive a reduced density-matrix formalism from which we examine how photon loss affects coherence. It is shown that particular entangled number states, which contain a special superposition of photons in both arms of a Mach-Zehnder interferometer, are resilient to environmental decoherence. We demonstrate an order of magnitude greater visibility with loss than possible with path-entangled parallel to N,0 >+parallel to 0,N > states. We also show that the effectiveness of a detection scheme is related to super-resolution visibility.
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页数:5
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