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9 March 2023 Demonstration of universal time-reversal for quantum processes
Peter Schiansky, Teodor Strömberg, David Trillo, Valeria Saggio, Benjamin Dive, Miguel Navascués, Philip Walther
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Proceedings Volume PC12446, Quantum Computing, Communication, and Simulation III; PC124460B (2023) https://doi.org/10.1117/12.2648803
Event: SPIE Quantum West, 2023, San Francisco, California, United States
Abstract
Current protocols to revert time evolutions of quantum systems suffer either from low success probabilities, or from not being universal - they require knowledge about the evolving state, its evolution, or the interaction through which the evolution is reverted. We overcome these limitations, and demonstrate a novel universal time-reversal protocol by implementing it on a photonic platform using a quantum SWITCH. The schemes universality is verified and a clear quantum advantage with respect to the optimal classical stragegy is shown through running the protocol on a large parameter set and reverting a photons' polarization state with an average state fidelity of over 95%.
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Peter Schiansky, Teodor Strömberg, David Trillo, Valeria Saggio, Benjamin Dive, Miguel Navascués, and Philip Walther "Demonstration of universal time-reversal for quantum processes", Proc. SPIE PC12446, Quantum Computing, Communication, and Simulation III, PC124460B (9 March 2023); https://doi.org/10.1117/12.2648803
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KEYWORDS
Switches
Classical physics
Polarization
Quantum mechanics
Thermodynamics
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