Quantum chaotic system as a model of decohering environment

Details Quantum chaotic system as a model of decohering environment Quantum chaotic system as a model of decohering environment

2008-06-27

arxiv.org/abs/0806.4517v3

EPL, Vol. 85, (2009) 50006

Physics

Quantum Physics

5 pages, 3 figures. Published version!

Scientific paper

10.1209/0295-5075/85/50006

As a model of decohering environment, we show that quantum chaotic system behave equivalently as many-body system. An approximate formula for the time evolution of the reduced density matrix of a system interacting with a quantum chaotic environment is derived. This theoretical formulation is substantiated by the numerical study of decoherence of two qubits interacting with a quantum chaotic environment modeled by a chaotic kicked top. Like the many-body model of environment, the quantum chaotic system is efficient decoherer, and it can generate entanglement between the two qubits which have no direct interaction.

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