Quantum discord and Maxwell's demons - art. no. 012320

摘要

Quantum discord was proposed as an information-theoretic measure of the "quantumness" of correlations. I show that discord determines the difference between the efficiency of quantum and classical Maxwell's demons-that is, entities that can or cannot measure nonlocal observables or carry out conditional quantum operations-in extracting work from collections of correlated quantum systems. [References: 30]