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

Ana Laura Gramajo, Daniel Domínguez and María José Sánchez ()
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Ana Laura Gramajo: Centro Atómico Bariloche and Instituto Balseiro
Daniel Domínguez: Centro Atómico Bariloche and Instituto Balseiro
María José Sánchez: Centro Atómico Bariloche and Instituto Balseiro

The European Physical Journal B: Condensed Matter and Complex Systems, 2017, vol. 90, issue 12, 1-10

Abstract: 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.

Keywords: Mesoscopic; and; Nanoscale; Systems (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1140/epjb/e2017-80563-y

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