Non-Hermitian Anharmonicity Induces Single-Photon Emission
arXiv:2212.06307 · doi:10.1103/PhysRevLett.130.243601
Abstract
Single-photon sources are in high demand for quantum information applications. A paradigmatic way to achieve single-photon emission is through anharmonicity in the energy levels, such that the absorption of a single photon from a coherent drive shifts the system out of resonance and prevents absorption of a second one. We identify a novel mechanism for single-photon emission through non-Hermitian anharmonicity, i.e., anharmonicity in the losses instead of in the energy levels. We demonstrate the mechanism in two types of systems, including a feasible setup consisting of a hybrid metallodielectric cavity weakly coupled to a two-level emitter, and show that it induces high-purity single-photon emission at high repetition rates.
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- Dynamical Blockade Optimizing via Particle Swarm Optimization Algorithm
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