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

A. GRAMAJO; D. DOMINGUEZ; M. J. SANCHEZ

EUROPEAN PHYSICAL JOURNAL B - CONDENSED MATTER

SPRINGER

Año: 2017

1434-6028

We study the manipulation of quantum entanglement by periodic external fields. As an entan-glement measure we compute numerically the concurrence of two coupled superconducting qubits bothdriven by a dc+ac external control parameter. We show that when the driving term of the Hamiltoniancommutes with the qubit-qubit interaction term, it is possible to create or destroy entanglement in a con-trolled way by tuning the system at or near multiphoton resonances. On the other hand, when the drivingdoes not commute with the qubit-qubit interaction, the control and generation of entanglement inducedby the driving field is more robust and extended in parameter space, beyond the multiphoton resonances.