Inducing nonclassical lasing via periodic drivings in circuit quantum electrodynamics

Navarette-Benlloch, Carlos, García-Ripoll, Juan José and Porras, Diego (2014) Inducing nonclassical lasing via periodic drivings in circuit quantum electrodynamics. Physical Review Letters, 113 (193601). ISSN 0031-9007

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We show how a pair of superconducting qubits coupled to a microwave cavity mode can be used to engineer a single-atom laser that emits light into a nonclassical state. Our scheme relies on the dressing of the qubit-field coupling by periodic modulations of the qubit energy. In the dressed basis, the radiative decay of the first qubit becomes an effective incoherent pumping mechanism that injects energy into the system, hence turning dissipation to our advantage. A second, auxiliary qubit is used to shape the decay within the cavity, in such a way that lasing occurs in a squeezed basis of the cavity mode. We characterize the system both by mean-field theory and exact calculations. Our work may find applications in the generation of squeezing and entanglement in circuit QED, as well as in the study of dissipative few- and many-body phase transitions.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Richard Chambers
Date Deposited: 16 Oct 2015 11:58
Last Modified: 14 Mar 2017 09:39

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