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Quantum entropy production as a measure of irreversibility

✍ Scribed by I Callens; W De Roeck; T Jacobs; C Maes; K Netočný

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
75 KB
Volume
187
Category
Article
ISSN
0167-2789

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✦ Synopsis

We consider conservative quantum evolutions possibly interrupted by macroscopic measurements. When started in a nonequilibrium state, the resulting path-space measure is not time-reversal invariant and the weight of time-reversal breaking equals the exponential of the entropy production. The mean entropy production can then be expressed via a relative entropy on the level of histories. This gives a partial extension of the result for classical systems, that the entropy production is given by the source term of time-reversal breaking in the path-space measure.

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