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  • 1802.07205v1

    Rights statement: © 2018 American Physical Society

    Accepted author manuscript, 4.81 MB, PDF document

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Information gain and loss for a quantum Maxwell's demon

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Information gain and loss for a quantum Maxwell's demon. / Naghiloo, M.; Alonso, J. J.; Romito, A. et al.
In: Physical review letters, Vol. 121, No. 3, 030604, 17.07.2018.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Naghiloo, M, Alonso, JJ, Romito, A, Lutz, E & Murch, KW 2018, 'Information gain and loss for a quantum Maxwell's demon', Physical review letters, vol. 121, no. 3, 030604. https://doi.org/10.1103/PhysRevLett.121.030604

APA

Naghiloo, M., Alonso, J. J., Romito, A., Lutz, E., & Murch, K. W. (2018). Information gain and loss for a quantum Maxwell's demon. Physical review letters, 121(3), Article 030604. https://doi.org/10.1103/PhysRevLett.121.030604

Vancouver

Naghiloo M, Alonso JJ, Romito A, Lutz E, Murch KW. Information gain and loss for a quantum Maxwell's demon. Physical review letters. 2018 Jul 17;121(3):030604. doi: 10.1103/PhysRevLett.121.030604

Author

Naghiloo, M. ; Alonso, J. J. ; Romito, A. et al. / Information gain and loss for a quantum Maxwell's demon. In: Physical review letters. 2018 ; Vol. 121, No. 3.

Bibtex

@article{124632cf58eb4453be19957f3045682f,
title = "Information gain and loss for a quantum Maxwell's demon",
abstract = "We use continuous weak measurements of a driven superconducting qubit to experimentally study the information dynamics of a quantum Maxwell's demon. We show how information gained by a demon who can track single quantum trajectories of the qubit can be converted into work using quantum coherent feedback. We verify the validity of a quantum fluctuation theorem with feedback by utilizing information obtained along single trajectories. We demonstrate, in particular, that quantum backaction can lead to a loss of information in imperfect measurements. We furthermore probe the transition between information gain and loss by varying the initial purity of the qubit.",
keywords = "quant-ph, cond-mat.mes-hall, cond-mat.stat-mech",
author = "M. Naghiloo and Alonso, {J. J.} and A. Romito and E. Lutz and Murch, {K. W.}",
note = "{\textcopyright} 2018 American Physical Society",
year = "2018",
month = jul,
day = "17",
doi = "10.1103/PhysRevLett.121.030604",
language = "English",
volume = "121",
journal = "Physical review letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "3",

}

RIS

TY - JOUR

T1 - Information gain and loss for a quantum Maxwell's demon

AU - Naghiloo, M.

AU - Alonso, J. J.

AU - Romito, A.

AU - Lutz, E.

AU - Murch, K. W.

N1 - © 2018 American Physical Society

PY - 2018/7/17

Y1 - 2018/7/17

N2 - We use continuous weak measurements of a driven superconducting qubit to experimentally study the information dynamics of a quantum Maxwell's demon. We show how information gained by a demon who can track single quantum trajectories of the qubit can be converted into work using quantum coherent feedback. We verify the validity of a quantum fluctuation theorem with feedback by utilizing information obtained along single trajectories. We demonstrate, in particular, that quantum backaction can lead to a loss of information in imperfect measurements. We furthermore probe the transition between information gain and loss by varying the initial purity of the qubit.

AB - We use continuous weak measurements of a driven superconducting qubit to experimentally study the information dynamics of a quantum Maxwell's demon. We show how information gained by a demon who can track single quantum trajectories of the qubit can be converted into work using quantum coherent feedback. We verify the validity of a quantum fluctuation theorem with feedback by utilizing information obtained along single trajectories. We demonstrate, in particular, that quantum backaction can lead to a loss of information in imperfect measurements. We furthermore probe the transition between information gain and loss by varying the initial purity of the qubit.

KW - quant-ph

KW - cond-mat.mes-hall

KW - cond-mat.stat-mech

U2 - 10.1103/PhysRevLett.121.030604

DO - 10.1103/PhysRevLett.121.030604

M3 - Journal article

VL - 121

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 3

M1 - 030604

ER -