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 …

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

Detecting single–photon level signals—carriers of both classical and quantum information—
is particularly challenging for low-energy microwave frequency excitations. Here we …

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 …

The strong coupling limit of cavity quantum electrodynamics (QED) implies the capability of a
matterlike quantum system to coherently transform an individual excitation into a single …

In quantum error correction, information is encoded in a high-dimensional system to protect
it from the environment. A crucial step is to use natural, two-body operations with an ancilla …

An individual excited two-level system decays to its ground state in a process known as
spontaneous emission. The probability of detecting the emitted photon decreases …

Active qubit reset is a key operation in many quantum algorithms, and particularly in
quantum error correction. Here, we experimentally demonstrate a reset scheme for a three …

Degenerate parametric amplifiers (DPAs) exhibit the unique property of phase-sensitive
gain and can be used to noiselessly amplify small signals or squeeze field fluctuations …

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 …