Active and Passive Quantum Erasers for Neutral Kaons

A. Bramon, G. Garbarino, B. C. Hiesmayr

备注：: 17 pages, LaTeX, 1 figure, references added, accepted by Phys. Rev. A
发表信息：: Phys.Rev. A69 (2004) 062111
DOI：: 10.1103/PhysRevA.69.062111

英文摘要：

Quantum marking and quantum erasure are discussed for the neutral kaon system. Contrary to other two-level systems, strangeness and lifetime of a neutral kaon state can be alternatively measured via an "active" or a "passive" procedure. This offers new quantum erasure possibilities. In particular, the operation of a quantum eraser in the "delayed choice" mode is clearly illustrated.

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