Generation of entanglement statistics with a large-scale integrated photonic-electronic circuit

Abstract:Continuous-variable quantum processors scale with the modes they can transform, and each transformation adds loss. We demonstrate optoelectronic quantum information processing, moving the mixing into radio-frequency electronics after homodyne detection. Squeezed vacuum falls on a large-scale integrated photonic-electronic circuit, a 32-channel coherent receiver array whose radio-frequency network mixes the analog photocurrents. A local-oscillator ramp reconstructs the two-mode covariance at the aperture, which is physical, and its partial transpose has smallest symplectic eigenvalue 0.99270, three standard deviations below the separability bound. Mode transformation becomes a circuit function whose scale follows integrated electronics. With electro-optic transducers in place of the photodiodes, the same receiver would transfer optical modes into superconducting circuits and back, toward a photonic-electronic quantum computer spanning the optical and microwave bands.

Quantum Physics (quant-ph); Signal Processing (eess.SP); Optics (physics.optics)

arXiv:2609.06471 [quant-ph]

(or arXiv:2609.06471v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2609.06471 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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