Decoherence alias Loschmidt echo of the environment
量子物理
2013-05-29 v1
摘要
Entanglement between a quantum system and its environment leads to loss of coherence in the former. In general, the temporal fate of coherences is complicated. Here, we establish the connection between decoherence of a central system and fidelity decay in the environment for a variety of situations, including both, energy conserving and dissipative couplings. We show how properties of unitary time evolution of the environment can be inferred from the non-unitary evolution of coherences in the central system. This opens up promising ways for measuring Loschmidt echoes in a variety of situations.
引用
@article{arxiv.quant-ph/0405011,
title = {Decoherence alias Loschmidt echo of the environment},
author = {T. Gorin and T. Prosen and T. H. Seligman and W. T. Strunz},
journal= {arXiv preprint arXiv:quant-ph/0405011},
year = {2013}
}
备注
6 pages, no figures