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Preparation information and optimal decompositions for mixed quantum states | | Andrei N. Soklakov
; Ruediger Schack
; | | Date: |
9 Feb 2000 | | Journal: | J. Mod. Opt. 47, 2265-2276 (2000) | | Subject: | quant-ph | | 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. | | Source: | arXiv, quant-ph/0002027 | | Services: | Forum | Review | PDF | Favorites | |
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