Materials challenges and opportunities for quantum computing hardware

NP De Leon, KM Itoh, D Kim, KK Mehta, TE Northup… - Science, 2021 - science.org
BACKGROUND The past two decades have seen intense efforts aimed at building quantum
computing hardware with the potential to solve problems that are intractable on classical …

Blueprint for a high-performance fluxonium quantum processor

LB Nguyen, G Koolstra, Y Kim, A Morvan, T Chistolini… - PRX Quantum, 2022 - APS
Transforming stand-alone qubits into a functional, general-purpose quantum processing unit
requires an architecture where many-body quantum entanglement can be generated and …

[HTML][HTML] A quantum engineer's guide to superconducting qubits

P Krantz, M Kjaergaard, F Yan, TP Orlando… - Applied physics …, 2019 - pubs.aip.org
The aim of this review is to provide quantum engineers with an introductory guide to the
central concepts and challenges in the rapidly accelerating field of superconducting …

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 …

Perspectives of quantum annealing: Methods and implementations

P Hauke, HG Katzgraber, W Lechner… - Reports on Progress …, 2020 - iopscience.iop.org
Quantum annealing is a computing paradigm that has the ambitious goal of efficiently
solving large-scale combinatorial optimization problems of practical importance. However …

High-fidelity, frequency-flexible two-qubit fluxonium gates with a transmon coupler

L Ding, M Hays, Y Sung, B Kannan, J An, A Di Paolo… - Physical Review X, 2023 - APS
We propose and demonstrate an architecture for fluxonium-fluxonium two-qubit gates
mediated by transmon couplers (FTF, for fluxonium-transmon-fluxonium). Relative to …

Multiplexed superconducting qubit control at millikelvin temperatures with a low-power cryo-CMOS multiplexer

R Acharya, S Brebels, A Grill, J Verjauw, T Ivanov… - Nature …, 2023 - nature.com
Large-scale superconducting quantum computers require the high-fidelity control and
readout of large numbers of qubits at millikelvin temperatures, resulting in a massive input …

High-fidelity parametric beamsplitting with a parity-protected converter

Y Lu, A Maiti, JWO Garmon, S Ganjam, Y Zhang… - nature …, 2023 - nature.com
Fast, high-fidelity operations between microwave resonators are an important tool for
bosonic quantum computation and simulation with superconducting circuits. An attractive …

Superconducting circuit companion—an introduction with worked examples

SE Rasmussen, KS Christensen, SP Pedersen… - PRX Quantum, 2021 - APS
This tutorial aims at giving an introductory treatment of the circuit analysis of
superconducting qubits, ie, two-level systems in superconducting circuits. It also touches …

Long-Distance Transmon Coupler with cz-Gate Fidelity above

F Marxer, A Vepsäläinen, SW Jolin, J Tuorila, A Landra… - PRX Quantum, 2023 - APS
Tunable coupling of superconducting qubits has been widely studied due to its importance
for isolated gate operations in scalable quantum processor architectures. Here, we …