False loss of coherence

Details False loss of coherence False loss of coherence

2011-10-10

arxiv.org/abs/1110.2199v1

Physics

Quantum Physics

18 pages. This paper was published in {\bf Relativistic Quantum Measurement and Decoherence}, ed F. Petruccione, Springer Vela

Scientific paper

The loss of coherence of a quantum system coupled to a heat bath as expressed by the reduced density matrix is shown to lead to the miss-characterization of some systems as being incoherent when they are not. The spin boson problem and the harmonic oscillator with massive scalar field heat baths are given as examples of reduced incoherent density matrices which nevertheless still represent perfectly coherent systems.

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