Bimodal non-Gaussian photonic states from a single quantum emitter in a waveguide

Abstract:We investigate the generation of deterministic and heralded non-Gaussian states of light, using a single two-level system coupled to a chiral waveguide. We study the case of a single two level system driven by pulsed coherent and squeezed drive in a chiral waveguide. For coherent input pulses, we show that the emitter can deterministically generate Wigner-negative states, albeit of limited rank. Going beyond, using squeezed-vacuum inputs, we show that the interaction produces bimodal non-Gaussian states from which higher-stellar-rank states, including large squeezed cat states, can be experimentally extracted with a substantial success rate. Motivated by experimental implementations, we further analyze the effect of imperfect coupling and of the intrinsic $50\%$ collection limit of symmetric, non-chiral waveguides. Finally, we propose a simple interferometric scheme that recovers an effectively chiral interaction in an otherwise bidirectional waveguide.

arXiv:2608.03658 [quant-ph]

(or arXiv:2608.03658v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2608.03658 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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