Demonstration of universal time-reversal for quantum processes with arbitrarily high probability of success

Peter Schiansky; Teodor Strömberg; David Trillo; Valeria Saggio; Benjamin Dive; Miguel Navascués; Philip Walther

doi:10.1117/12.2632427

19 July 2022 Demonstration of universal time-reversal for quantum processes with arbitrarily high probability of success

Peter Schiansky, Teodor Strömberg, David Trillo, Valeria Saggio, Benjamin Dive, Miguel Navascués, Philip Walther

Author Affiliations +

Proceedings Volume PC12243, Photonics for Quantum 2022; PC1224313 (2022) https://doi.org/10.1117/12.2632427
Event: Photonics for Quantum, 2022, Rochester, NY, 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%.

Conference Presentation

Citation Download Citation

Peter Schiansky, Teodor Strömberg, David Trillo, Valeria Saggio, Benjamin Dive, Miguel Navascués, and Philip Walther "Demonstration of universal time-reversal for quantum processes with arbitrarily high probability of success", Proc. SPIE PC12243, Photonics for Quantum 2022, PC1224313 (19 July 2022); https://doi.org/10.1117/12.2632427

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