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paper

Maxwell's Demon, Szilard's Engine and Quantum Measurements

arXiv:quant-ph/0301076

Abstract

We propose and analyze a quantum version of Szilard's ``one-molecule engine.'' In particular, we recover, in the quantum context, Szilard's conclusion concerning the free energy ``cost'' of measurements: $ΔF \geq k_B T\ln2$ per bit of information.

9 pages, 1 figure