Single-photon routing induced by giant atoms in a synthetic frequency dimension
Phys. Rev. A 112, 033724 – Published 29 September, 2025
DOI: https://doi.org/10.1103/9ym6-xw81
Abstract
We propose a hardware-efficient single-photon routing scheme in a synthetic frequency dimension based on a dynamically modulated multimode ring resonator and a driven cyclic three-level superconducting circuit, which effectively models a two-level giant atom coupled to a pair of one-dimensional lattices in the synthetic frequency dimension. The routing dynamics of single-photon wave packets in the frequency dimension are investigated numerically and analytically. Our results show that by tuning the phase of the external field, the photon transmission between the two frequency lattices can be well controlled, thereby determining the propagation direction of photons within the ring resonator. This work presents a feasible scheme for implementing a controllable node in quantum networks, and the predictions of this scheme are well within reach of state-of-the-art experiments.
