Quantum-mechanical effects at the macroscopic level were first explored in Josephson-
junction-based superconducting circuits in the 1980s. In recent decades, the emergence of …

Transmon qubits are ubiquitously used in superconducting quantum information processor
architectures. Strong drives are required to realize fast, high-fidelity, gates and …

A two-level system resonantly interacting with an ac magnetic or electric field constitutes the
physical basis of diverse phenomena and technologies. However, Schrödinger's equation …

Josephson circuits have been ideal systems with which to study complex nonlinear
dynamics that can lead to chaotic behavior and instabilities. More recently, Josephson …

We study multiphoton blockade and photon-induced tunneling effects in the two-photon
Jaynes-Cummings model, where a single-mode cavity field and a two-level atom are …

The development of quantum computing hardware is facing the challenge that current-day
quantum processors, comprising 50–100 qubits, already operate outside the range of …

In recent experiments, the light-matter interaction has reached the ultrastrong coupling limit,
which can give rise to dynamical generalizations of spatial symmetries in periodically driven …

Superconducting circuits are a versatile platform to implement a multitude of Hamiltonians
that perform quantum computation, simulation, and sensing tasks. A key ingredient for …

The quantum Rabi model (QRM) is a fundamental model for light-matter interactions. A
fascinating feature of the QRM is that it manifests a quantum phase transition which is …

Methods for modeling large driven-dissipative quantum systems are becoming increasingly
urgent due to recent experimental progress in a number of photonic platforms. We …