On the generators of quantum dynamical semigroups with invariant subalgebras

Abstract

The problem of characterizing GKLS-generators and CP-maps with an invariant appeared in different guises in the literature. We prove two unifying results which hold even for weakly closed *-algebras: First, we show how to construct a normal form for $\mathcal{A}$-invariant GKLS-generators, if a normal form for $\mathcal{A}$-invariant CP-maps is known - rendering the two problems essentially equivalent. Second, we provide a normal form for $\mathcal{A}$-invariant CP-maps if $\mathcal{A}$ is atomic (which includes the finite-dimensional case). As an application we reproduce several results from the literature as direct consequences of our characterizations and thereby point out connections between different fields.

20+7 pages; small improvements to the presentation; close to published version

References in corpus (2)

• Transforming quantum operations: quantum supermaps
• Quantum and classical dynamical semigroups of superchannels and semicausal channels

Cited by in corpus (1)

• Exact Model Reduction for Continuous-Time Open Quantum Dynamics