Population rate of quantum states and the reverse of the arrow of time.

Recently it has been pointed out that an outstanding application of an IBM quantum computer is to reverse the arrow of time (Lesovik et al., 2019). It is explored such a possibility in a quantum computer composed by a two qubits system coupled to a common structured reservoir at zero temperature. The requirement of zero temperature is for avoiding the unwanted quantum noise due to dissipation of energy and decoherence in such a quantum computer. It is shown that population rates of the quantum states become the same both towards the remote past and towards the remote future. A two qubits system in presence of noise can reverse the arrow of time. Such a result opens the way for exploring such a possibility in another different quantum devices. [ABSTRACT FROM AUTHOR]