Decoherence in the Spin Bath

Details Decoherence in the Spin Bath Decoherence in the Spin Bath

1995-11-02

arxiv.org/abs/cond-mat/9511009v1

Physics

Condensed Matter

4 pages, RevTex, 1 figure appended at the end of file, Sumbitted to PRL 18 July 1995, e-mail: stamp@physics.ubc.ca

Scientific paper

We develop a mathematical description of the decoherence caused by "spin baths", such as nuclear spins or magnetic impurities. In contrast to the usual oscillator bath models of quantum environments, decoherence in the spin bath can occur without any dissipation. Given the almost ubiquitous presence of nuclear spins in nature, our results have important consequences for quantum measurement theory, particularly as the decoherence mechanisms in spin baths work very differently from those in oscillator baths.

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