Over the last two decades, tremendous advances have been made for constructing large-
scale quantum computers. In particular, quantum computing platforms based on …

Recent experiments have demonstrated that light and matter can mix together to an extreme
degree, and previously uncharted regimes of light-matter interactions are currently being …

In the past 20 years, impressive progress has been made both experimentally and
theoretically in superconducting quantum circuits, which provide a platform for manipulating …

This article reviews recent theoretical and experimental advances in the fundamental
understanding and active control of quantum fluids of light in nonlinear optical systems. In …

We measure the dispersive energy-level shift of an LC resonator magnetically coupled to a
superconducting qubit, which clearly shows that our system operates in the ultrastrong …

During the past decade, research into superconducting quantum bits (qubits) based on
Josephson junctions has made rapid progress. Many foundational experiments have been …

This article presents a review of recent developments on various aspects of the quantum
Rabi model. Particular emphasis is given on the exact analytic solution obtained in terms of …

Within extended coherent states, a recent exact solution to the quantum Rabi model
(QRM)[D. Braak, Phys. Rev. Lett. 107, 100401 (2011) PRLTAO 0031-9007 …

We consider two separate atoms interacting with a single-mode optical or microwave
resonator. When the frequency of the resonator field is twice the atomic transition frequency …

We consider the phase-transition-like behavior in the Rabi model containing a single two-
level system, or qubit, and a single harmonic oscillator. The system experiences a sudden …