Abstract
We consider a nonstationary circuit quantum electrodynamics setup in which a three-level artificial atom in the configuration interacts with a single-mode cavity field of natural frequency . It is demonstrated that when some atomic energy level(s) undergoes a weak harmonic modulation, photons can be generated from vacuum via effective one- and three-photon transitions, while the atom remains approximately in the ground state. These phenomena occur in the dispersive regime when the modulation frequency is accurately tuned near and , respectively, and the generated field states exhibit strikingly different statistics from the squeezed vacuum state attained in the standard cavity dynamical Casimir effect.
- Received 13 May 2018
DOI:https://doi.org/10.1103/PhysRevA.98.022520
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