Waveguide quantum electrodynamics

Waveguide Quantum Electrodynamics (Waveguide QED) is a field of study that explores the interaction between quantum emitters—such as atoms, quantum dots, or superconducting qubits—and the confined electromagnetic modes of a one-dimensional waveguide. Unlike conventional cavity QED, where light is trapped between mirrors, waveguide QED allows photons to propagate freely along a guided mode, enabling long-range interactions between distant quantum systems. This setup enhances light–matter coupling and provides a powerful platform for investigating quantum nonlinear optics, photon-mediated entanglement, and collective quantum phenomena. Its relevance extends to the development of scalable quantum networks, quantum communication channels, and photonic quantum computing architectures, as it allows precise control and routing of quantum information carried by single photons.

In our research team we are interested in developing research on this subject with focus on design of new quantum devices for integrated quantum information and computation between delocalized quantum workstations (as shown in the picture). You can check our recent work on time-delayed effects in waveguide QED.