Beating the break-even point with a discrete-variable-encoded logical qubit.

ABSTRACT: 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 time¹. In most QEC codes^2-8, a logical qubit is encoded in some discrete variables, for example photon numbers, so that the encoded quantum information can be unambiguously extracted after processing. Over the past decade, repetitive QEC has been demonstrated with various discrete-variable-encoded scenarios^9-17. However, extending the lifetimes of thus-encoded logical qubits beyond the best available physical qubit still remains elusive, which represents a break-even point for judging the practical usefulness of QEC. Here we demonstrate a QEC procedure in a circuit quantum electr

SUBMITTER: Ni Z 

PROVIDER: S-EPMC10076216 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature