Initial states and decoherence of histories

Details Initial states and decoherence of histories Initial states and decoherence of histories

2004-05-14

arxiv.org/abs/quant-ph/0405080v1

J. Math. Phys. 46, 042108 (2005) ; with minor changes.

Physics

Quantum Physics

10 pages

Scientific paper

10.1063/1.1888030

We study decoherence properties of arbitrarily long histories constructed from a fixed projective partition of a finite dimensional Hilbert space. We show that decoherence of such histories for all initial states that are naturally induced by the projective partition implies decoherence for arbitrary initial states. In addition we generalize the simple necessary decoherence condition [Scherer et al., Phys. Lett. A (2004)] for such histories to the case of arbitrary coarse-graining.

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