Space-time dual quantum Zeno effect: Interferometric engineering of open quantum system dynamics

TL;DR

This paper explores how superposing quantum trajectories through interferometry can induce a space-time dual to the quantum Zeno effect, leading to phenomena like state freezing and Dicke-like superradiance without multi-atom correlations.

Contribution

It introduces the concept of a space-time dual quantum Zeno effect and demonstrates its ability to induce state freezing and superradiance in open quantum systems.

Findings

Superposition of trajectories can cause quantum state freezing.

Space-time dual to the quantum Zeno effect is demonstrated.

Dicke-like superradiance occurs without multi-atom correlations.

Abstract

Superposition of trajectories, which modify quantum evolutions by superposing paths through interferometry, has been utilized to enhance various quantum communication tasks. However, little is known about its impact from the viewpoint of open quantum systems. Thus, we examine this subject from the perspective of system-environment interactions. We show that the superposition of multiple trajectories can result in quantum state freezing, suggesting a space-time dual to the quantum Zeno effect. Moreover, non-trivial Dicke-like super(sub)radiance can be triggered without utilizing multi-atom correlations.