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Updated: Dec 28, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Probing exciton/exciton interactions with entangled photons: Theory
Eric R Bittner1, Hao Li2, Andrei Piryatinski3
1Department of Chemistry and Department of Physics, University of Houston, Houston, Texas 77204, USA and Department of Physics, Durham University, Durham, United Kingdom.
Abstract:
Quantum entangled photons provide a sensitive probe of many-body interactions and offer a unique experimental portal for quantifying many-body correlations in a material system. In this paper, we present a theoretical demonstration of how photon-photon entanglement can be generated via interactions between coupled qubits. Here, we develop a model for the scattering of an entangled pair of photons from a molecular dimer. We develop a diagrammatic theory for the scattering matrix and show that one can correlate the von Neumann entropy of the outgoing bi-photon wave function with exciton exchange and repulsion interactions. We conclude by discussing possible experimental scenarios for realizing these ideas.
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