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%.
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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