Time-reversal of an unknown quantum state

Phys.org  August 10, 2020
According to quantum mechanics, the final irreversibility of conceptual time reversal requires extremely intricate and implausible scenarios that are unlikely to spontaneously occur in nature. Physicists had previously shown that it is possible to design an algorithm to artificially reverse a time arrow to a known or given state within an IBM quantum computer. An international team of researchers (USA – MIT, Google, Argonne National Laboratory, University of Chicago, Russia, Spain) built on their previous work to develop a technical method to reverse the temporal evolution of an arbitrary unknown quantum state. The technical work will open new routes for general universal algorithms to send the temporal evolution of an arbitrary system backward in time. This work only outlined the mathematical process of time reversal without experimental implementations…read more. Open Access TECHNICAL ARTICLE  1 , 2 , 3

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