arXiv:quant-ph/0402212·v2·Quantum Physics
Active and Passive Quantum Erasers for Neutral Kaons
A. Bramon🇪🇸 · G. Garbarino🇮🇹 · B.C. Hiesmayr🇦🇹
Abstract
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.
Comments: 17 pages, LaTeX, 1 figure, references added, accepted by Phys. Rev. A