A universal quantum rewinding protocol with an arbitrarily high probability of success

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 system will reach the desired state with probability 1 after some finite number of steps.

arXiv comment4+4 pages, 3 figures

References in corpus (7)

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• Demonstration of universal time-reversal for quantum processes
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Cited by in corpus (8)

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• Experimental superposition of time directions
• Experimental demonstration of input-output indefiniteness in a single quantum device
• Optimal universal quantum circuits for unitary complex conjugation
• Reversing Unknown Quantum Processes via Virtual Combs for Channels with Limited Information
• Universal adjointation of isometry operations using conversion of quantum supermaps
• Analytical Lower Bound on Query Complexity for Transformations of Unknown Unitary Operations