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Communications Physics, volume 3, issue 1, publication number 129

Time-reversal of an unknown quantum state

LEBEDEV A.V. ¹

Vinokur Valerii ^{2, 3}

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Moscow Institute of Physics and Technology, Dolgoprudny, Russia |

Materials Science division, Argonne National Laboratory, Argonne, USA |

Consortium for Advanced Science and Engineering (CASE) University of Chicago, Chicago, USA |

Publication type: Journal Article

Publication date: 2020-07-21

Springer Nature

Journal: Communications Physics

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Impact factor: 5.5

ISSN: 23993650

DOI: 10.1038/s42005-020-00396-0

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General Physics and Astronomy

Abstract

For decades, researchers have sought to understand how the irreversibility of the surrounding world emerges from the seemingly time-symmetric, fundamental laws of physics. Quantum mechanics conjectured a clue that final irreversibility is set by the measurement procedure and that the time-reversal requires complex conjugation of the wave function, which is overly complex to spontaneously appear in nature. Building on this Landau-Wigner conjecture, it became possible to demonstrate that time-reversal is exponentially improbable in a virgin nature and to design an algorithm artificially reversing a time arrow for a given quantum state on the IBM quantum computer. However, the implemented arrow-of-time reversal embraced only the known states initially disentangled from the thermodynamic reservoir. Here we develop a procedure for reversing the temporal evolution of an arbitrary unknown quantum state. This opens the route for general universal algorithms sending temporal evolution of an arbitrary system backward in time.

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LEBEDEV A., Vinokur V. Time-reversal of an unknown quantum state // Communications Physics. 2020. Vol. 3. No. 1. 129

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LEBEDEV A., Vinokur V. Time-reversal of an unknown quantum state // Communications Physics. 2020. Vol. 3. No. 1. 129

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TY - JOUR

DO - 10.1038/s42005-020-00396-0

UR - https://doi.org/10.1038%2Fs42005-020-00396-0

TI - Time-reversal of an unknown quantum state

T2 - Communications Physics

AU - LEBEDEV, A.V.

AU - Vinokur, Valerii

PY - 2020

DA - 2020/07/21 00:00:00

PB - Springer Nature

IS - 1

VL - 3

SN - 2399-3650

ER -

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@article{2020_LEBEDEV,

author = {A.V. LEBEDEV and Valerii Vinokur},

title = {Time-reversal of an unknown quantum state},

journal = {Communications Physics},

year = {2020},

volume = {3},

publisher = {Springer Nature},

month = {jul},

url = {https://doi.org/10.1038%2Fs42005-020-00396-0},

number = {1},

doi = {10.1038/s42005-020-00396-0}

}

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Publisher

Springer Nature

Journal

Communications Physics

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Quartile WOS

Impact factor

5.5

ISSN

23993650 (Electronic)

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