Dissipation entanglement control of two coupled qubits via strong driving fields

TL;DR

This paper develops an analytical approach to control and optimize entanglement in two coupled superconducting qubits under strong driving fields, accounting for dissipation and decoherence effects.

Contribution

It introduces a Floquet--Markov based technique for adjusting field amplitudes to effectively manage entanglement in dissipative qubit systems.

Findings

Conditions for entanglement generation and destruction identified.

Method for controlling entanglement via field amplitude adjustment.

Effective entanglement control considering decoherence effects.

Abstract

An analytical theory to calculate the dissipatively stable concurrence in the system of two coupled flux superconducting qubits in the strong driving field is developed. The conditions for the entanglement state generation and destruction during the formation of the multiphoton transitions regions due to the interference of Landau--Zener--St\"uckelberg--Majorana are found. Based on the solution of the Floquet--Markov equation, the technique is proposed to adjust the amplitudes of dc- and ac-fields for effective control of the entanglement between qubit states while taking into account the effects of the decoherence.