Tripartite entanglement dynamics in a system of strongly driven qubits

TL;DR

This paper investigates the dynamics of tripartite entanglement in a system of two strongly driven qubits coupled to a dissipative cavity, explaining entanglement revival through tripartite correlations and second-order coupling effects.

Contribution

It provides a detailed explanation of entanglement revival in driven qubits by analyzing tripartite entanglement and the role of second-order coupling to the environment.

Findings

Entanglement loss correlates with strong tripartite entanglement involving the cavity.

Entanglement revival is due to an inverse process of tripartite entanglement dynamics.

The entanglement decay follows an exponential form influenced by second-order coupling.

Abstract

We study the dynamics of tripartite entanglement in a system of two strongly driven qubits individually coupled to a dissipative cavity. We aim at explanation of the previously noted entanglement revival between two qubits in this system. We show that the periods of entanglement loss correspond to the strong tripartite entanglement between the qubits and the cavity and the recovery has to do with an inverse process. We demonstrate that the overall process of qubit-qubit entanglement loss is due to the second order coupling to the external continuum which explains the exp[-g^2 t/2+g^2 k t^3/6+\cdot] for of the entanglement loss reported previously.