Eur. Phys. J. B (2017) 90: 255
https://doi.org/10.1140/epjb/e2017-80563-y

Regular Article

Entanglement generation through the interplay of harmonic driving and interaction in coupled superconducting qubits

Centro Atómico Bariloche and Instituto Balseiro, 8400 San Carlos de Bariloche, Argentina

^a e-mail: majo@cab.cnea.gov.ar

Received: 3 August 2017
Received in final form: 6 October 2017
Published online: 18 December 2017

Abstract

We study the manipulation of quantum entanglement by periodic external fields. As an entanglement measure we compute numerically the concurrence of two coupled superconducting qubits both driven by a dc + ac external control parameter. We show that when the driving term of the Hamiltonian commutes with the qubit–qubit interaction term, it is possible to create or destroy entanglement in a controlled way by tuning the system at or near multiphoton resonances. On the other hand, when the driving does not commute with the qubit–qubit interaction, the control and generation of entanglement induced by the driving field is more robust and extended in parameter space, beyond the multiphoton resonances.