arXiv 0705.41772007-05-29quant-ph

Path-phase duality of an interfering particle with translational-internal entanglement

M. Kolar, T. Opatrny, N. Bar-Gill, N. Erez, G. Kurizki

备注：: 14 pages, 5 figures
发表信息：: New J. Phys. 9 (2007) 129
DOI：: 10.1088/1367-2630/9/5/129

英文摘要：

The aim of this paper is to revisit the implications of complementarity when we inject into a Mach Zehnder interferometer particles with internal structure, prepared in special translational-internal entangled (TIE) states. This correlation causes the path distinguishability to be phase dependent in contrast to the standard case. We show that such a TIE state permits us to detect small phase shifts along with almost perfect path distinguishability, beyond the constraints imposed by complementarity on simultaneous which-way and which-phase measurements for standard cases (when distinguishability is independent of interferometric phase).

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