Onset of Decoherence in Open Quantum Systems

TL;DR

This paper presents a new approximation method to evaluate the onset of decoherence in open quantum systems at low temperatures, especially useful for quantum computing applications.

Contribution

The paper introduces a novel approximation scheme that complements Markovian approaches for analyzing decoherence at short and intermediate times.

Findings

Effective at low temperatures and short times

Applicable to quantum computing schemes

Provides a complementary approach to existing methods

Abstract

We introduce a new approximation scheme for evaluation of onset of decoherence at low temperatures in quantum systems interacting with environment. The approximation is argued to apply at short and intermediate times. It provides an approach complementary to Markovian approximations and appropriate for evaluation of quantum computing schemes.