Covariant Ergodic Quantum Markov Semigroups via Systems of Imprimitivity

TL;DR

This paper develops relativistically consistent quantum Markov semigroups using covariant completely positive maps and systems of imprimitivity, applicable to fundamental particles and ensuring ergodicity through Poincaré group symmetries.

Contribution

It generalizes Stinespring's dilation to systems of imprimitivity, enabling construction of covariant, ergodic quantum Markov semigroups in a relativistic framework.

Findings

Constructed relativistic quantum Markov semigroups from covariant CP maps.

Demonstrated applicability to light-like particles.

Ensured ergodicity via transitive systems of imprimitivity.

Abstract

We construct relativistic quantum Markov semigroups from covariant completely positive maps. We proceed by generalizing a step in Stinespring's dilation to a general system of imprimitivity and basing it on Poincar\'e group. The resulting noise channels are relativistically consistent and the method is applicable to any fundamental particle, though we demonstrate it for the case of light-like particles. The Krauss decomposition of the relativistically consistent completely positive identity preserving maps (our set up is in Heisenberg picture) enables us to construct the covariant quantum Markov semigroups that are uniformly continuous. We induce representations from the little groups to ensure the quantum Markov semigroups that are ergodic due to transitive systems imprimitivity.