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

Qudit is a multi-level computational unit alternative to the conventional 2-level qubit.
Compared to qubit, qudit provides a larger state space to store and process information, and …

Quantum error correction protects fragile quantum information by encoding it into a larger
quantum system,. These extra degrees of freedom enable the detection and correction of …

The manner in which states of some quantum systems become effectively classical is of
great significance for the foundations of quantum physics, as well as for problems of …

Quantum error correction (QEC) can overcome the errors experienced by qubits and is
therefore an essential component of a future quantum computer. To implement QEC, a qubit …

Quantum computers promise to exceed the computational efficiency of ordinary classical
machines because quantum algorithms allow the execution of certain tasks in fewer steps …

Realizing the potential of quantum computing will require achieving sufficiently low logical
error rates. Many applications call for error rates in the $10^{-15} $ regime, but state-of-the …

Since the first observation of coherent quantum behaviour in a superconducting qubit, now
more than 20 years ago, there have been substantial developments in the field of …

Quantum error correction (QEC) aims to protect logical qubits from noises by using the
redundancy of a large Hilbert space, which allows errors to be detected and corrected in real …

Quantum computing becomes viable when a quantum state can be protected from
environment-induced error. If quantum bits (qubits) are sufficiently reliable, errors are sparse …