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Universal Quantum Rewinding Protocol with an Arbitrarily High Probability of Success

D. Trillo, B. Dive, and M. Navascués
Phys. Rev. Lett. 130, 110201 – Published 14 March 2023
Physics logo See synopsis: Hitting Rewind on Quantum Processes
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Abstract

We present a universal mechanism that, acting on any target qubit, propagates it to the state it had T time units before the experiment started. This protocol works by setting the target on a superposition of flight paths, where it is acted on by uncharacterized, but repeatable, quantum operations. Independently of the effect of each of these individual operations on the target, the successful interference of the paths causes it to leap to its past state. We prove that, for generic interaction effects, the protocol will herald a successful rewinding with probability 1 after some finite number of steps.

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  • Received 5 April 2022
  • Accepted 31 January 2023

DOI:https://doi.org/10.1103/PhysRevLett.130.110201

© 2023 American Physical Society

Physics Subject Headings (PhySH)

General PhysicsQuantum Information, Science & Technology

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Hitting Rewind on Quantum Processes

Published 14 March 2023

A new technique for reversing the evolution of a quantum system could become a key tool in quantum information technology.

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Authors & Affiliations

D. Trillo1,2, B. Dive1, and M. Navascués1

  • 1Institute for Quantum Optics and Quantum Information (IQOQI) Vienna, Boltzmanngasse 3, A-1090 Vienna
  • 2University of Vienna, Faculty of Physics and Vienna Doctoral School in Physics, Boltzmanngasse 5, A-1090 Vienna, Austria

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Issue

Vol. 130, Iss. 11 — 17 March 2023

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