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 …

Towards understanding two-level-systems in amorphous solids: insights from quantum circuits

C Müller, JH Cole, J Lisenfeld - Reports on Progress in Physics, 2019 - iopscience.iop.org
Amorphous solids show surprisingly universal behaviour at low temperatures. The
prevailing wisdom is that this can be explained by the existence of two-state defects within …

Materials loss measurements using superconducting microwave resonators

CRH McRae, H Wang, J Gao, MR Vissers… - Review of Scientific …, 2020 - pubs.aip.org
The performance of superconducting circuits for quantum computing is limited by materials
losses. In particular, coherence times are typically bounded by two-level system (TLS) …

Material matters in superconducting qubits

CE Murray - Materials Science and Engineering: R: Reports, 2021 - Elsevier
The progress witnessed within the field of quantum computing has been enabled by the
identification and understanding of interactions between the state of the quantum bit (qubit) …

Path toward manufacturable superconducting qubits with relaxation times exceeding 0.1 ms

J Verjauw, R Acharya, J Van Damme, T Ivanov… - npj Quantum …, 2022 - nature.com
As the superconducting qubit platform matures towards ever-larger scales in the race
towards a practical quantum computer, limitations due to qubit inhomogeneity through lack …

On-demand storage and retrieval of microwave photons using a superconducting multiresonator quantum memory

Z Bao, Z Wang, Y Wu, Y Li, C Ma, Y Song, H Zhang… - Physical Review Letters, 2021 - APS
We realize on-demand storage and retrieval of weak coherent microwave photon pulses at
the single-photon level. A superconducting multiresonator system which is composed of a …

Substrate surface engineering for high-quality silicon/aluminum superconducting resonators

CT Earnest, JH Béjanin, TG McConkey… - Superconductor …, 2018 - iopscience.iop.org
Quantum bits (qubits) with long coherence times are an important element for the
implementation of medium-and large-scale quantum computers. In the case of …

Control over epitaxy and the role of the InAs/Al interface in hybrid two-dimensional electron gas systems

E Cheah, DZ Haxell, R Schott, P Zeng, E Paysen… - Physical Review …, 2023 - APS
In situ synthesized semiconductor/superconductor hybrid structures became an important
material platform in condensed matter physics. Their development enabled a plethora of …

Cryogenic single-port calibration for superconducting microwave resonator measurements

H Wang, S Singh, CRH McRae, JC Bardin… - Quantum Science …, 2021 - iopscience.iop.org
Superconducting circuit testing and materials loss characterization requires robust and
reliable methods for the extraction of internal and coupling quality factors of microwave …

Near-field terahertz nanoscopy of coplanar microwave resonators

X Guo, X He, Z Degnan, BC Donose, K Bertling… - Applied Physics …, 2021 - pubs.aip.org
Superconducting quantum circuits are one of the leading quantum computing platforms. To
advance superconducting quantum computing to a point of practical importance, it is critical …