Interaction with a pre and post selected environment and recoherence
量子物理
2016-09-08 v1 广义相对论与量子宇宙学
高能物理 - 理论
摘要
The interaction of an open system with a pre- and post-selected environment is studied. In general, under such circumstances can not be described in terms of a density matrix, {\it even when in not post-selected}. However, a simple description in terms of a two-state (TS) is always available. The two-state of evolves in time from an initially `pure' TS to a `mixed' TS and back to a final `pure' TS. This generic process is governed by a modified Liouville equation, which is derived. For a sub-class of observables, which can still be described by an ordinary density matrix, this evolution generates recoherence to a final pure state. In some cases post-selection can even suppress any decoherence.
引用
@article{arxiv.quant-ph/9501023,
title = {Interaction with a pre and post selected environment and recoherence},
author = {B. Reznik},
journal= {arXiv preprint arXiv:quant-ph/9501023},
year = {2016}
}
备注
17 pages, Latex.