Preparation information and optimal decompositions for mixed quantum states
Quantum Physics
2015-06-26 v1
Abstract
Consider a joint quantum state of a system and its environment. A measurement on the environment induces a decomposition of the system state. Using algorithmic information theory, we define the preparation information of a pure or mixed state in a given decomposition. We then define an optimal decomposition as a decomposition for which the average preparation information is minimal. The average preparation information for an optimal decomposition characterizes the system-environment correlations. We discuss properties and applications of the concepts introduced above and give several examples.
Cite
@article{arxiv.quant-ph/0002027,
title = {Preparation information and optimal decompositions for mixed quantum states},
author = {Andrei N. Soklakov and Ruediger Schack},
journal= {arXiv preprint arXiv:quant-ph/0002027},
year = {2015}
}
Comments
13 pages, latex, 2 postscript figures