Role of many-body entanglement in decoherence processes

Details Role of many-body entanglement in decoherence processes Role of many-body entanglement in decoherence processes

2002-10-16

arxiv.org/abs/quant-ph/0210125v1

Phys. Rev. A 68, 063814 (2003)

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevA.68.063814

A pure state decoheres into a mixed state as it entangles with an environment. When an entangled two-mode system is embedded in a thermal environment, however, each mode may not be entangled with its environment by their simple linear interaction. We consider an exactly solvable model to study the dynamics of a total system, which is composed of an entangled two-mode system and a thermal environment, and also an array of infinite beam splitters. It is shown that many-body entanglement of the system and the environment plays a crucial role in the process of disentangling the system.

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