Frequency conversion in ultrastrong cavity QED

Abstract

We propose a new method for frequency conversion of photons which is both versatile and deterministic. We show that a system with two resonators ultrastrongly coupled to a single qubit can be used to realize both single- and multiphoton frequency-conversion processes. The conversion can be exquisitely controlled by tuning the qubit frequency to bring the desired frequency-conversion transitions on or off resonance. Considering recent experimental advances in ultrastrong coupling for circuit QED and other systems, we believe that our scheme can be implemented using available technology.

16 pages, 10 figures

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• Simulating ultrastrong-coupling processes breaking parity conservation in Jaynes-Cummings systems
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• Probing higher-order transitions through scattering of microwave photons in the ultrastrong-coupling regime of circuit QED
• Microwave multiphoton conversion via coherently driven permanent dipole systems
• Vacuum radiation and frequency-mixing in linear light-matter systems
• Parity-assisted generation of nonclassical states of light in circuit quantum electrodynamics
• Para-particle oscillator simulations on a trapped ion quantum computer
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• Spontaneous Scattering of Raman Photons from Cavity-QED Systems in the Ultrastrong Coupling Regime