Channels, measurements and post-selection in quantum thermodynamics

Abstract

We analyse the benefit, in terms of extracting work, of having a single use of a quantum channel or measurement in quantum thermodynamics. This highlights a connection between unital and catalytic channels, and some subtleties concerning the conditional work cost of implementing a measurement given that a certain result was obtained. We also consider post-selected measurements, and show that any non-trivial post-selection leads to an unbounded work benefit.

18 Pages

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Cited by in corpus (5)

• Quantum thermal machines and batteries
• Quantum measurements constrained by the third law of thermodynamics
• Universal validity of the second law of information thermodynamics
• Classicality of the heat produced by quantum measurements
• No-go result for quantum postselection measurements of rank-m degenerate subspace