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Information-to-work conversion by Maxwell's demon in a superconducting circuit quantum electrodynamical system.

ABSTRACT: Information thermodynamics bridges information theory and statistical physics by connecting information content and entropy production through measurement and feedback control. Maxwell's demon is a hypothetical character that uses information about a system to reduce its entropy. Here we realize a Maxwell's demon acting on a superconducting quantum circuit. We implement quantum non-demolition projective measurement and feedback operation of a qubit and verify the generalized integral fluctuation theorem. We also evaluate the conversion efficiency from information gain to work in the feedback protocol. Our experiment constitutes a step toward experimental studies of quantum information thermodynamics in artificially made quantum machines.

SUBMITTER: Masuyama Y

PROVIDER: S-EPMC5876355 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature

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Information-to-work conversion by Maxwell's demon in a superconducting circuit quantum electrodynamical system.

Masuyama Y Y Funo K K Murashita Y Y Noguchi A A Kono S S Tabuchi Y Y Yamazaki R R Ueda M M Nakamura Y Y

Nature communications 20180329 1

Information thermodynamics bridges information theory and statistical physics by connecting information content and entropy production through measurement and feedback control. Maxwell's demon is a hypothetical character that uses information about a system to reduce its entropy. Here we realize a Maxwell's demon acting on a superconducting quantum circuit. We implement quantum non-demolition projective measurement and feedback operation of a qubit and verify the generalized integral fluctuation ...[more]

PMID: 29599432

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