Depolarization for quantum channels with higher symmetries

TL;DR

This paper introduces a method to analyze depolarizing quantum channels with higher symmetries, extending the understanding of depolarization beyond simple qubit models to more complex systems.

Contribution

It proposes a framework for handling depolarizing dynamics in systems with arbitrary symmetries within the Markov approximation.

Findings

Generalized depolarization model for symmetric quantum systems

Extension of depolarization analysis beyond qubits

Framework applicable to complex quantum systems

Abstract

The depolarization channel is usually modelled as a quantum operation that destroys all input information, replacing it by a completely chaotic state. For qubits this has a quite intuitive interpretation as a shrinking of the Bloch sphere. We propose a way to deal with depolarizing dynamics (in the Markov approximation) for systems with arbitrary symmetries.