Non-unital non-Markovianity of quantum dynamics

Understand

We show that Breuer-Laine-Piilo (BLP) non-Markovianity cannot capture the dynamical information in the non-unital aspect of the quantum dynamics.

• Moreover, we provide a measure on the effect of the non-unitality of quantum processes on the infinitesimal non-divisibility.
• This measure can be used as a supplement to BLP non-Markovianity for non-unital quantum processes.
• A measure on the degree of the non-unital behavior of quantum processes is also given in this paper.