Engineering the Level Structure of a Giant Artificial Atom in Waveguide Quantum Electrodynamics

Understand

Engineering light-matter interactions at the quantum level has been central to the pursuit of quantum optics for decades.

• Traditionally, this has been done by coupling emitters, typically natural atoms and ions, to quantized electromagnetic fields in optical and microwave cavities.
• In these systems, the emitter is approximated as an idealized dipole, as its physical size is orders of magnitude smaller than the wavelength of light.
• Recently, artificial atoms made from superconducting circuits have enabled new frontiers in light-matter coupling, including the study of "giant" atoms which cannot be approximated as simple dipoles.