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arXiv · 2505.10121

Generation of frequency entanglement with an effective quantum dot-waveguide two-photon quadratic interaction

Mohamed Meguebel·Maxime Federico·Simone Felicetti·Nadia Belabas·Nicolas Fabre
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Abstract

Light-matter interactions with quantum dots have been extensively studied to harness key quantum properties of photons, such as indistinguishability and entanglement. In this theoretical work, we exploit the atomic-like four-level structure of a quantum dot coupled to a waveguide to model a shaping frequency entangling gate (FrEnGATE) for single photons. Our approach is based on the identification of input frequencies and an atomic level structure for which frequency-dependent one-photon transitions are adiabatically eliminated, while frequency-dependent two-photon transitions are resonantly enhanced. The frequency entanglement performance of the gate is analyzed using a Schmidt decomposition for continuous variables, revealing a trade-off between entanglement generation efficiency and entanglement quality. We further demonstrate the use of the FrEnGATE for the generation of entangled frequency qudit states.

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Mohamed Meguebel, Maxime Federico, Simone Felicetti, Nadia Belabas, Nicolas Fabre. 2025-05-15. Generation of frequency entanglement with an effective quantum dot-waveguide two-photon quadratic interaction. https://doi.org/10.1364/opticaq.571592

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