Encoding information redundantly using quantum error-correcting (QEC) codes allows one
to overcome the inherent sensitivity to noise in quantum computers to ultimately achieve …

In this paper, we investigate the relationship between entanglement and nonstabilizerness
(also known as magic) in matrix product states (MPSs). We study the relation between magic …

Probabilistic error cancellation (PEC) is a technique that generates error-mitigated estimates
of expectation values from ensembles of quantum circuits. In this work we extend the …

We describe Qiskit, a software development kit for quantum information science. We discuss
the key design decisions that have shaped its development, and examine the software …

We construct a fault-tolerant quantum error-correcting protocol based on a qubit encoded in
a large spin qudit using a spin-cat code, analogous to the continuous-variable cat encoding …

Topological color codes are widely acknowledged as promising candidates for fault-tolerant
quantum computing. Neither a two-dimensional nor a three-dimensional topology, however …

Quantum computing is an emerging technology with potentially far-reaching implications for
national prosperity and security. Understanding the timeframes over which economic …

We implement logically encoded three-qubit circuits for the quantum Fourier transform
(QFT), using the [[7, 1, 3]] Steane code, and benchmark the circuits on the Quantinuum H2-1 …

Quantum computers process information with the laws of quantum mechanics. Current
quantum hardware is noisy, can only store information for a short time, and is limited to a few …

One of the key aspects in the realization of large-scale fault-tolerant quantum computers is
quantum error correction (QEC). The first essential step of QEC is to encode the logical state …