Controlling Entanglement Dynamics by Choosing Appropriate Ratio between Cavity-Fiber Coupling and Atom-Cavity Coupling

TL;DR

This paper investigates how the entanglement dynamics between two atoms in separate cavities connected by an optical fiber can be controlled by adjusting the ratio of cavity-fiber to atom-cavity coupling strengths.

Contribution

It demonstrates that entanglement evolution, including sudden death phenomena, can be manipulated through the ratio of coupling parameters, providing a method for controlling quantum entanglement.

Findings

Entanglement dynamics depend on initial state entanglement.

Adjusting the ratio of coupling strengths controls entanglement evolution.

The entanglement can be preserved or manipulated by choosing specific coupling ratios.

Abstract

The entanglement characteristics including the so-called sudden death effect between two identical two-level atoms trapped in two separate cavities connected by an optical fiber are studied. The results show that the time evolution of entanglement is sensitive not only to the degree of entanglement of the initial state but also to the ratio between cavity-fiber coupling () and atom-cavity coupling (). This means that the entanglement dynamics can be controlled by choosing specific v and g.