Channels, measurements, and postselection in quantum thermodynamics.
basic_science · Level V
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- Record sourced from PubMed, PMID 34412318.
- Also identified by DOI 10.1103/PhysRevE.104.014111.
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Abstract
We analyze 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 postselected measurements and show that any nontrivial postselection leads to an unbounded work benefit.