Although the study of ultracold quantum gases trapped by light is a prominent direction of
modern research, the quantum properties of light were widely neglected in this field …

We consider a process of parameter estimation in a spin-j system surrounded by a quantum-
critical spin chain. Quantum Fisher information lies at the heart of the estimation task. We …

We propose an architecture based on superconducting qubits and resonators for the
implementation of a variety of exotic lattice systems, such as spin and Hubbard models in …

Circuit QED on a chip has become a powerful platform for simulating complex many-body
physics. In this report, we realize a Dicke-Ising model with an antiferromagnetic nearest …

We show how a quantum Ising spin chain in a time-dependent transverse magnetic field can
be simulated and experimentally probed in the framework of circuit QED with current …

Quantum matter with exotic topological order has potential applications in quantum
computation. However, in present experiments, the manipulations on topological states are …

In the present manuscript, we introduce a quantum system of two superconducting qubits (S–
Qs) interacting with a quantized field under the influence of the Kerr nonlinear medium and …

Superconducting qubits connected in an array can form quantum many-body systems such
as the quantum Ising model. By coupling the qubits to a superconducting resonator, the …

We propose a potentially practical scheme for quantum state transfer between a Cooper-pair
box circuit and an electron spin ensemble of diamond nitrogen-vacancy (NV) centers. Both …

The connectivity and tunability of superconducting qubits and resonators provide us with an
appealing platform to study the many-body physics of microwave excitations. Here we …