Loss of quantum coherence in a system coupled to a zero-temperature environment

Details Loss of quantum coherence in a system coupled to a zero-temperature environment Loss of quantum coherence in a system coupled to a zero-temperature environment

2004-02-24

arxiv.org/abs/quant-ph/0402176v2

Physics

Quantum Physics

Scientific paper

10.1140/epjb/e2005-00284-2

We discuss the influence of a zero-temperature environment on a coherent quantum system. First, we calculate the reduced density operator of the system in the framework of the well-known, exactly solvable model of an oscillator coupled to a bath of harmonic oscillators. Then, we propose the sketch of an Aharonov--Bohm-like interferometer showing, through interference measurements, the decrease of the coherence length of the system due to the interaction with the environment, even in the zero temperature limit.

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