Millisecond coherence in a superconducting qubit

A Somoroff, Q Ficheux, RA Mencia, H Xiong… - Physical Review Letters, 2023 - APS
Improving control over physical qubits is a crucial component of quantum computing
research. Here we report a superconducting fluxonium qubit with uncorrected coherence …

Reducing unitary and spectator errors in cross resonance with optimized rotary echoes

N Sundaresan, I Lauer, E Pritchett, E Magesan… - PRX Quantum, 2020 - APS
We present an improvement to the cross resonance gate realized with the addition of
resonant, target rotary pulses. These pulses, applied directly to the target qubit, are …

Silicon qubit fidelities approaching incoherent noise limits via pulse engineering

CH Yang, KW Chan, R Harper, W Huang, T Evans… - Nature …, 2019 - nature.com
Spin qubits created from gate-defined silicon metal–oxide–semiconductor quantum dots are
a promising architecture for quantum computation. The high single qubit fidelities possible in …

Scalable randomized benchmarking of quantum computers using mirror circuits

T Proctor, S Seritan, K Rudinger, E Nielsen… - Physical Review Letters, 2022 - APS
The performance of quantum gates is often assessed using some form of randomized
benchmarking. However, the existing methods become infeasible for more than …

Practical guide for building superconducting quantum devices

YY Gao, MA Rol, S Touzard, C Wang - PRX Quantum, 2021 - APS
Quantum computing offers a powerful new paradigm of information processing that has the
potential to transform a wide range of industries. In the pursuit of the tantalizing promises of …

Direct randomized benchmarking for multiqubit devices

TJ Proctor, A Carignan-Dugas, K Rudinger, E Nielsen… - Physical review …, 2019 - APS
Benchmarking methods that can be adapted to multiqubit systems are essential for
assessing the overall or “holistic” performance of nascent quantum processors. The current …

Diabatic gates for frequency-tunable superconducting qubits

R Barends, CM Quintana, AG Petukhov, Y Chen… - Physical review …, 2019 - APS
We demonstrate diabatic two-qubit gates with Pauli error rates down to 4.3 (2)× 10-3 in as
fast as 18 ns using frequency-tunable superconducting qubits. This is achieved by …

Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform

M Ganzhorn, G Salis, DJ Egger, A Fuhrer… - Physical Review …, 2020 - APS
The possibility to utilize different types of two-qubit gates on a single quantum computing
platform adds flexibility in the decomposition of quantum algorithms. A larger hardware …

[HTML][HTML] Randomized benchmarking with gate-dependent noise

JJ Wallman - Quantum, 2018 - quantum-journal.org
We analyze randomized benchmarking for arbitrary gate-dependent noise and prove that
the exact impact of gate-dependent noise can be described by a single perturbation term …

Quantum simulation of dissipative collective effects on noisy quantum computers

M Cattaneo, MAC Rossi, G García-Pérez, R Zambrini… - Prx quantum, 2023 - APS
Dissipative collective effects are ubiquitous in quantum physics and their relevance ranges
from the study of entanglement in biological systems to noise mitigation in quantum …