2003/11/19 by A. Bramon, A. Bramòn, G. Garbarino +5
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #hep-ph #quant-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0311232
Invited talk at the Workshop on e+e- in the 1-2 GeV range, Alghero, Italy, September 2003 (eConf C0309101)
arxiv created 2003/11/19 · arxiv updated 2009/12/01
The aim of this contribution is to illustrate two basic aspects of quantum mechanics applied to the neutral kaon system. We first describe a recent quantitative formulation of Bohr's complementarity principle for free--space evolution of single kaons and entangled kaon pairs. We then show that the neutral kaon system is also suitable for an optimal demonstration of the ``quantum eraser'', including its operation in the ``delayed choice'' mode. In our discussions, strangeness oscillations play the role of the traditional interference pattern linked to wave--like behaviour. The role of the two interferometric paths taken by particle--like objects is played by the differently propagating KS and KL components. Their distinct decay widths provide a quantum ``mark'' which can be erased by appropriate strangeness measurements.