Abstract
Quantum Information has been discussed in almost all areas of physics reigned by quantum mechanics, except particle physics. Here I demonstrate that quantum information as a fundamental concept can be extended to the regime of particle physics and relativistic quantum field theory. I shall describe a scheme of quantum teleportation and entanglement swapping in terms of neutral kaons. In this scheme, the kaon whose state is to be teleported collides with one of the two entangled kaons in an Einstein-Podolsky-Rosen state. Subsequent detection of the outgoing particles of the collision completes the two-qubit projection on Alice side. In this scheme, notions of quantum information science naturally connect with conservation laws of particle physics. I will also explain basic ideas on how to define quantum entanglement in the setting of relativistic quantum field theory.
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