Quantum interference in timed Dicke basis and its effect on bipartite entanglement

TL;DR

This paper investigates how position-dependent excitation phases induce quantum interference in atomic qubits, significantly affecting entanglement dynamics and potentially preventing entanglement sudden death.

Contribution

It introduces the concept of vacuum mediated quantum interference in the timed Dicke basis and explores its impact on bipartite entanglement.

Findings

Quantum interference modifies entanglement evolution.

Coherent population transfer affects entanglement dynamics.

Entanglement sudden death can be prevented under certain conditions.

Abstract

We analyze the effect of position dependent excitation phase on the properties of entanglement between two qubits formed in atomic systems. We show that the excitation phase induces a vacuum mediated quantum interference in the system that affects the dynamical behavior of entanglement between the qubits. It is also found that the quantum interference leads to a coherent population transfer between the symmetric and antisymmetric states which can considerably modify the dynamics of two-qubit entanglement and can even prevent finite time disentanglement (sudden death) under certain conditions.