Single-photon manipulations based on optically controlled chiral couplings in waveguide structures of Rydberg giant atoms

作者：Yao-Tong Chen, Lei Du, Zhihai Wang, M. Artoni, G. C. La Rocca, Jin‐Hui Wu · 发表于：Physical Review A · 年份：2024 · DOI：10.1103/physreva.109.063710 · 被引用次数：15 · 研究领域：Cold Atom Physics and Bose-Einstein Condensates、Quantum optics and atomic interactions、Quantum Information and Cryptography

Two interacting Rydberg atoms coupled to a waveguide may realize a giant-atom platform that exhibits controllable (phase-dependent) chirality through which the direction of nonreciprocally scattered photons can be switched on demand, e.g., by the geometrical tuning of an external driving field. In our platform, at variance with traditional setups, the chirality arises from a simple optical implementation of the local phase difference between two coupling points of the Rydberg giant atom. When employing two (or more) driving fields, this platform can also be used as a frequency converter with its strongly asymmetric efficiency being significantly enhanced via the chiral couplings. Our Rydberg giant-atom platform is well suited for chiral quantum optics applications and further offers direct scalability for reaching tunable frequency conversion in the optical domain.