Collective Enhancement of Photon Blockade via Two-Photon Interactions
- URL: http://arxiv.org/abs/2511.11506v1
- Date: Fri, 14 Nov 2025 17:26:34 GMT
- Title: Collective Enhancement of Photon Blockade via Two-Photon Interactions
- Authors: Lijuan Dong, Aanal Jayesh Shah, Peter Kirton, Hadiseh Alaeian, Simone Felicetti,
- Abstract summary: Photon blockade is a key quantum optical effect in which the presence of one photon prevents the transmission of subsequent ones.<n>We show that when light and matter are coupled via a two-photon interaction, both single- and multi-photon blockade can benefit from a collective enhancement.
- Score: 0.050188155804360805
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Analogous to Coulomb blockade for electrons, photon blockade is a key quantum optical effect in which the presence of one photon prevents the transmission of subsequent ones through a nonlinear medium. Beyond its fundamental interest, photon and multi-photon blockade are actively studied as mechanisms for generating technologically-relevant quantum states of light. Although photon blockade typically requires achieving strong light-matter coupling, increasing the number of atoms fails to enhance antibunching. Here, we analyze the optical transmission properties of a quantum resonator that embeds a two-photon-coupled ensemble of emitters, combining an approximate analytical approach with full quantum numerical simulations. We show that when light and matter are coupled via a two-photon interaction, both single- and multi-photon blockade can benefit from a collective enhancement. We propose different driving schemes in which the second or third-order correlation functions are strongly suppressed with increasing atom number. Differently from established methods, this collective enhancement of non-classical properties occurs with unitary transmission and is ultimately constrained only by decoherence. This demonstrates that collective two-photon couplings are a powerful mechanism for realizing photon blockade even in platforms where individual strong coupling is not achievable.
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