Many-Body Photon Blockade and Quantum Light Generation from Cavity Quantum Materials

• URL: http://arxiv.org/abs/2411.08964v1
• Date: Wed, 13 Nov 2024 19:00:25 GMT
• Title: Many-Body Photon Blockade and Quantum Light Generation from Cavity Quantum Materials
• Authors: Benjamin Kass, Spenser Talkington, Ajit Srivastava, Martin Claassen,
• Abstract summary: We show that photons bear witness to cavity quantum-electrodynamical modifications of the material. We show that materials near a quantum critical point can realize a collective many-body photon blockade. Our findings provide new routes for interrogating and harnessing cavity-embedded quantum materials as quantum light sources.
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• Abstract: The strong coupling regime of photons and quantum materials inside optical cavities has emerged as a promising environment for manipulating states of matter with light. Here, in turn, we show that photons bear witness to cavity quantum-electrodynamical modifications of the material, leading to profoundly non-classical properties of light passing through the cavity. By generalizing quantum-optical input-output relations to correlated quantum materials, we study the second-order photon coherence g2(t) and demonstrate that antibunching of transmitted photons serves as direct evidence of light-induced changes to the cavity-embedded material. We show that materials near a quantum critical point can realize a collective many-body photon blockade, enabling the generation of single photons or Einstein-Podolsky-Rosen pairs via leveraging strong matter fluctuations. Our findings provide new routes for interrogating and harnessing cavity-embedded quantum materials as quantum light sources, as a resource for photon-based computation and quantum sensing.

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