We propose a method for the fast generation of nonclassical ground states of the Rabi
model in the ultrastrong and deep-strong coupling regimes via the shortcuts-to-adiabatic …

We propose tunable chiral bound states in a system composed of superconducting giant
atoms and a Josephson photonic-crystal waveguide (PCW), with no analog in other …

Quantum computing is considered as a next-generation information processing technology.
The basic element of a quantum computing system is a quantum bit, often called a qubit …

While the squeezing of a propagating field can, in principle, be made arbitrarily strong, the
cavity-field squeezing is subject to the well-known 3 dB limit, and thus has limited …

It has been a long-standing goal to improve dispersive qubit readout with squeezed light.
However, injected external squeezing (IES) cannot enable a practically interesting increase …

Qubit readout is an indispensable element of any quantum information processor. In this
work, we experimentally demonstrate a nonperturbative cross-Kerr couplingbetween a …

We propose a theoretical protocol to implement multiqubit geometric gates (ie, the Mølmer-
Sørensen gate) using photonic cat-state qubits. These cat-state qubits stored in high-Q …

We demonstrate a transmon-qubit readout based on the nonlinear response to a drive of
polaritonic meters in situ coupled to the qubit. Inside a three-dimensional readout cavity, we …

Strong coupling of semiconductor spin qubits to superconducting microwave resonators was
recently demonstrated [X. Mi, Nature 555, 599 (2018) NATUAS 0028-0836 …

Multi-photon processes deteriorate the quantum non-demolition (QND) character of the
dispersive readout in circuit QED, causing readout to lag behind single and two-qubit gates …