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Passive Quantum Erasure for Neutral Kaons

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arxiv quant-ph/0404086 v1 pith:EEGHG2OP submitted 2004-04-14 quant-ph hep-ph

classification quant-phhep-ph
keywords quantumerasureneutralkaonpassiveactivealternativelychoice
verification ladder T0 review T1 audit T2 compute T3 formal
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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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