title: Photonic Maxwell's Demon.
abstract: We report an experimental realization of Maxwell's demon in a photonic setup. We show that a measurement at the few-photons level followed by a feed-forward operation allows the extraction of work from intense thermal light into an electric circuit. The interpretation of the experiment stimulates the derivation of an equality relating work extraction to information acquired by measurement. We derive a bound using this relation and show that it is in agreement with the experimental results. Our work puts forward photonic systems as a platform for experiments related to information in thermodynamics.
authors.affiliation: QOLS, Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom.|Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Mihai D
authors.initials: MD
authors.lastname: Vidrighin
authors.affiliation: Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.|London Institute for Mathematical Sciences, 35a South Street, Mayfair WIK 2XF, United Kingdom.
authors.forename: Oscar
authors.initials: O
authors.lastname: Dahlsten
authors.affiliation: Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.|Dipartimento di Scienze, Università degli Studi Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Barbieri
authors.affiliation: QOLS, Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom.
authors.forename: M S
authors.initials: MS
authors.lastname: Kim
authors.affiliation: Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.|Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543 Singapore, Republic of Singapore.
authors.forename: Vlatko
authors.initials: V
authors.lastname: Vedral
authors.affiliation: Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Ian A
authors.initials: IA
authors.lastname: Walmsley