Quantendynamik offener Systeme, Trendbericht Theoretische Chemie 2020, Teil 3

TL;DR

This paper reviews recent numerical methods based on path integrals for modeling decoherence in open quantum systems, emphasizing non-perturbative system-environment interactions.

Contribution

It provides an overview of advanced numerical techniques for non-perturbative decoherence modeling in open quantum systems.

Findings

Path integral methods effectively describe decoherence.

Recent numerical approaches handle strong system-environment coupling.

The review highlights progress in non-perturbative regime simulations.

Abstract

Quantum mechanics describes the unitary time evolution of isolated systems. In reality, every quantum system interacts with its environment, leading to an irreversible loss of the phase relation. Path integral based methods provide a rigorous description of the process of decoherence. We provide an overview over recent numerical methods suited to describe the non-perturbative regime of system bath interaction. -- Quantenmechanik beschreibt die unit\"are Zeitentwicklung isolierter Systeme. In der Realit\"at interagiert jedes Quantensystem mit seiner Umwelt, was zu einem irreversiblen Verlust von Phasenbeziehungen f\"uhrt. Pfadintegralbasierte Methoden erlauben eine rigorose Beschreibung dieser Dekoh\"arenzprozesse.