Physics – Quantum Physics
Scientific paper
2000-02-09
J. Mod. Opt. 47, 2265-2276 (2000)
Physics
Quantum Physics
13 pages, latex, 2 postscript figures
Scientific paper
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.
Schack Ruediger
Soklakov Andrei N.
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