Multipartite Quantum Eraser

TL;DR

This paper investigates how entanglement and which-way information evolve in a multipartite quantum system, demonstrating a quantum eraser effect through sequential atom-field interactions and measurements.

Contribution

It introduces an analytical framework for entanglement distribution and complementarity relations in multipartite systems, enabling quantum eraser phenomena with current microwave cavity technology.

Findings

Distribution of which-way information among system parties

Analytical complementarity relations derived

Quantum eraser effect demonstrated with measurements

Abstract

We study the dynamical entanglement distribution in a multipartite system. The initial state is a maximally entangled two level atom with a single photon field. Next a sequence of atoms are sent, one at the time, and interact with the field. We show that the which way information initially stored only in the field is now distributed among the parties of the global system. We obtain the corresponding complementarity relations in analytical form. We show that this dynamics may lead to a quantum eraser phenomenon provided that measurements of the probe atoms are performed in a basis which maximizes the visibility. The process may be realized in microwave cavities with present technology.