Entanglement vs. the quantum-to-classical transition

Details Entanglement vs. the quantum-to-classical transition Entanglement vs. the quantum-to-classical transition

2004-09-20

arxiv.org/abs/quant-ph/0409133v1

Phys. Rev. A 72, 014102 (2005).

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.72.014102

We analyze the quantum-to-classical transition (QCT) for coupled bipartite quantum systems for which the position of one of the two subsystems is continuously monitored. We obtain the surprising result that the QCT can emerge concomitantly with the presence of highly entangled states in the bipartite system. Furthermore the changing degree of entanglement is associated with the back-action of the measurement on the system and is itself an indicator of the QCT. Our analysis elucidates the role of entanglement in von Neumann's paradigm of quantum measurements comprised of a system and a monitored measurement apparatus.

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