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Two-photon blockade in a cascaded cavity-quantum-electrodynamics system (1811.04405v1)

Published 11 Nov 2018 in quant-ph

Abstract: We investigate theoretically the model of a cavity-quantum-electrodynamics (QED) system that consists of two two-level atoms coupled to a single-mode cavity in the weak coupling regime, where the system is driven by quantum light. The dynamics behavior of the entire system is tackled in the framework of a cascaded quantum system. We find that the two-photon blockade with two-photon bunching and three-photon antibunching can be obtained even when the strong system dissipation is included. This result shows that our work has potential for realizing entangled photon pairs in a weakly coupled cavity. Moreover, we also analyze the photon statistics of the system in the case of out-of-resonance coupling between cavity and two nonidentical atoms. Here, an unconventional photon blockade effect with the suppression of two-photon correlation and enhancement of three-photon correlation can be realized, which shows many quantum statistical characteristics of cavity QED system in weak coupling.

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