Revival of transport reciprocity via quantum interference in asymmetric nonlinear devices

Abstract:Structural asymmetry combined with optical nonlinearity often leads to nonreciprocal light transport. We explore the mechanism by which 1-photon interference effects can revive reciprocity in such nonlinear models. To this end, we study correlated 2-photon scattering where an artificial atom is asymmetrically (a) side-coupled to an infinite waveguide at two spatially separated points, and (b) direct-coupled to two semi-infinite waveguides. The setup (a) gives robust reciprocal transport for the two photons. However, the setup (b) shows a transition from a nonreciprocal to a reciprocal regime by tuning the interference effect via an additional tunneling path for photons between the two waveguides.

Quantum Physics (quant-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Optics (physics.optics)

arXiv:2607.26898 [quant-ph]

(or arXiv:2607.26898v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2607.26898 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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