Lindblad evolutions, Born rule, Heralding and cloning

A. Auerbach, J. Avron, D. Gershoni, N. Tur

Published 2022-03-28Version 1

We discuss an apparent difficulty in computing the radiation emitted by a system undergoing Lindblad evolution. The difficulty is resolved by viewing the problem as Born rule for conserved currents defined by the appropriate terms in the adjoint Lindbladian. In Heralding Alice prepares Bob's system in a state that mirrors her test. We show that heralding is consistent with no-cloning. This follows from the observation that heralding is not a completely positive map.