“…In a number of physical scenarios, however, a Markovian description of the dynamics is inadequate [11][12][13]. Furthermore, memory effects may be beneficial for certain quantum-enhanced protocols, such as superdense coding [14,15], teleportation [16], and quantum key-distribution [17], and they play a key role as well in quantum thermodynamics [18] and measurement theory [19]. Their quantification in terms of information backflow has led to the introduction of a number of non-Markovianity measures or witnesses, based on the dynamical properties of different quantum information quantifiers [20][21][22][23][24][25].…”