Intrinsic Quantum Computation

Details Intrinsic Quantum Computation Intrinsic Quantum Computation

2006-11-19

arxiv.org/abs/quant-ph/0611202v2

Physics

Quantum Physics

5 pages, 1 figure, 1 table; updated with corrections; http://cse.ucdavis.edu/~cmg/compmech/pubs/iqc.htm

Scientific paper

10.1016/j.physleta.2007.07.052

We introduce ways to measure information storage in quantum systems, using a recently introduced computation-theoretic model that accounts for measurement effects. The first, the quantum excess entropy, quantifies the shared information between a quantum process's past and its future. The second, the quantum transient information, determines the difficulty with which an observer comes to know the internal state of a quantum process through measurements. We contrast these with von Neumann entropy and quantum entropy rate and provide a closed-form expression for the latter for the class of deterministic quantum processes.

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