Amplitude tuning of steady state entanglement in strongly driven coupled qubits

TL;DR

This paper introduces a method to generate and control steady state entanglement in coupled qubits using strong periodic driving, revealing rich dynamics including entanglement creation, death, and revival.

Contribution

It demonstrates a new mechanism for dissipative steady state entanglement tuning via amplitude control in strongly driven coupled qubits.

Findings

Steady entanglement occurs at multiphoton resonance conditions.

Entanglement degree can be tuned by drive amplitude.

Dynamic entanglement behavior includes creation, death, and revival.

Abstract

In this work we report on a new mechanism to generate dissipative steady state entanglement in two coupled qubits driven by strong periodic ac fields. We show that steady entanglement can be generated at one side of a multiphoton resonance between a non-entangled ground state and an entangled excited state. The degree of entanglement can be tuned as a function of the amplitude of the periodic drive. A rich dynamic behavior with creation, death and revival of entanglement can be observed for certain parameter regimes, accessible in current experimental devices.