Two-Polariton Blockade via Ultrastrong Light-Matter Coupling

• URL: http://arxiv.org/abs/2601.18083v1
• Date: Mon, 26 Jan 2026 02:37:37 GMT
• Title: Two-Polariton Blockade via Ultrastrong Light-Matter Coupling
• Authors: Ting-Ting Ma, Jian Tang, Yun-Lan Zuo, Ran Huang. Adam Miranowicz, Franco Nori, Hui Jing,
• Abstract summary: Two-polariton blockade (2PB) can occur under resonant single-polariton driving in an atom-cavity system operating in the ultrastrong coupling regime.<n>In the USC regime, where the ratio of the atom-cavity coupling strength to the cavity resonance frequency exceeds 0.1, hybrid light-matter quasiparticles known as polaritons emerge.
• Score: 13.663422151033473
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate that a two-polariton blockade (2PB) can occur under resonant single-polariton driving in an atom-cavity system operating in the ultrastrong coupling (USC) regime-a phenomenon qualitatively distinct from, and unattainable in, both the strong and weak coupling regimes. In the USC regime, where the ratio of the atom-cavity coupling strength to the cavity resonance frequency exceeds 0.1, hybrid light-matter quasiparticles known as polaritons emerge. By employing modified second- and third-order correlation functions appropriate for the USC regime, we predict the emergence of 2PB, characterized by pronounced two-polariton bunching accompanied by suppressed three-polariton coincidences. This Letter introduces a novel route to achieving 2PB, with promising implications for the realization of multiparticle quantum light sources in the USC regime.

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