Controllable superatom quantum nodes for photon routing in waveguide-based quantum networks
Phys. Rev. A 113, 023713 – Published 17 February, 2026
DOI: https://doi.org/10.1103/29th-t4ks
Abstract
Quantum routing of photons is an essential technique for building scalable quantum networks. In this work, we show that photons can be efficiently transferred between different ports via superatom quantum nodes, which are constructed by a couple of two-level atoms with direct couplings. We propose a multichannel scattering approach for studying photon transport in dual-waveguide systems. Quantum interference between collective quantum states is important for photon routing. We focus on superatom quantum nodes with two and three atoms, i.e., the atom dimer and trimer. By considering appropriate atomic spacings and direct couplings, port-selective high-efficiency photon routing can be achieved. Our work opens the way to superatom quantum routers in waveguide quantum networks.
