Decoherence-free interaction between giant atoms
In quantum-optics experiments with both natural and artificial atoms, the atoms are usually small enough that they can be approximated as...
A fully quantum analysis of the dynamical Casimir effect
By rapidly changing a boundary condition for the electromagnetic field, e.g., by moving a mirror very quickly, fluctuations in the...
Demonstrating amplification inside the Mollow triplet
One of the most basic setups imaginable in quantum optics is a single two-level atom coupled to an electromagnetic environment. In 1969,...
A review of microwave quantum optics with superconducting quantum circuits
After more than two and a half years of work, we have finally published the most comprehensive review to date of superconducting quantum...
Cavity QED with surface acoustic waves and superconducting qubits
Surface acoustic waves (SAWs) are vibrations propagating along the surface of a substrate at a typical speed of 3000 m/s. Since it was...
Quantum nonlinear optics for qubits
Continuing our investigations of processes in ultrastrongly coupled systems that do not conserve excitation number, we analyze setups...
Frequency conversion in ultrastrong cavity QED
When atoms and photons are ultrastrongly coupled, higher-order processes, which do not conserve the number of excitations in the system,...
Nonlinear optics with ultrastrong light-matter coupling
When atoms and photons are ultrastrongly coupled, higher-order processes, which do not conserve the number of excitations in the system,...
Feynman diagrams for ultrastrong cavity QED
When an atom is ultrastrongly coupled to a cavity, i.e., when the light-matter coupling strength is comparable to the atomic transition...
The physics of a giant atom
In quantum optics, one can usually assume that the size of an atom interacting with light is negligible compared to the wavelength of the...