Information revival without backflow: non-causal explanations of
non-Markovianity
Information revival without backflow: non-causal explanations of
non-Markovianity
The study of information revivals, witnessing the violation of certain data-processing inequalities, has provided an important paradigm in the study of non-Markovian processes. Although often used interchangeably, we argue here that the notions of ``revivals'' and ``backflows'', i.e., flows of information from the environment back into the system, are distinct: …