Stable, informative, coherent, and non-entanglement-breaking fixed points of multi-time quantum processes

The paper studies quantum processes in which information extracted from a forward simulation is returned as an input to an earlier internal time of the simulated dynamics, classifies the fixed points of the induced message channel (stability, informativeness, feedability, coherence, non-entanglement breaking), and certifies an explicit parameter square on which all four nontrivial properties provably coexist.