Simulating ultrastrong-coupling processes breaking parity conservation in Jaynes-Cummings systems
Journal article, 2020

We propose the effective simulation of light-matter ultrastrong-coupling phenomena with strong-coupling systems. Recent theory and experiments have shown that the quantum Rabi Hamiltonian can be simulated by a Jaynes-Cummings system with the addition of two classical drives. This allows one to implement nonlinear processes that do not conserve the total number of excitations. However, parity is still a conserved quantity in the quantum Rabi Hamiltonian, which forbids a wide family of processes involving virtual transitions that break this conservation. Here, we show that these parity-nonconserving processes can be simulated and that this can be done in an even simpler setup: A Jaynes-Cummings-type system with the addition of a single classical drive. By shifting the paradigm from simulating a particular model to simulating a particular process, we are able to implement a much wider family of nonlinear coherent protocols than in previous simulation approaches, doing so with fewer resources and constraints. We focus our analysis on three particular examples: A single atom exciting two photons, frequency conversion, and a single photon exciting two atoms.


Carlos Sánchez Munõz

University of Oxford


Anton Frisk Kockum


Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Adam Miranowicz


Adam Mickiewicz University in PoznaƄ

F. Nori


University of Michigan

Physical Review A

24699926 (ISSN) 24699934 (eISSN)

Vol. 102 3 033716

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

Control Engineering



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