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 …

Engineering high-coherence superconducting qubits

I Siddiqi - Nature Reviews Materials, 2021 - nature.com
Advances in materials science and engineering have played a central role in the
development of classical computers and will undoubtedly be critical in propelling the …

The future of quantum computing with superconducting qubits

S Bravyi, O Dial, JM Gambetta, D Gil… - Journal of Applied …, 2022 - pubs.aip.org
For the first time in history, we are seeing a branching point in computing paradigms with the
emergence of quantum processing units (QPUs). Extracting the full potential of computation …

Towards practical quantum computers: Transmon qubit with a lifetime approaching 0.5 milliseconds

C Wang, X Li, H Xu, Z Li, J Wang, Z Yang, Z Mi… - npj Quantum …, 2022 - nature.com
Here we report a breakthrough in the fabrication of a long lifetime transmon qubit. We use
tantalum films as the base superconductor. By using a dry etching process, we obtained …

New material platform for superconducting transmon qubits with coherence times exceeding 0.3 milliseconds

APM Place, LVH Rodgers, P Mundada… - Nature …, 2021 - nature.com
The superconducting transmon qubit is a leading platform for quantum computing and
quantum science. Building large, useful quantum systems based on transmon qubits will …

Surpassing millisecond coherence in on chip superconducting quantum memories by optimizing materials and circuit design

S Ganjam, Y Wang, Y Lu, A Banerjee, CU Lei… - Nature …, 2024 - nature.com
The performance of superconducting quantum circuits for quantum computing has advanced
tremendously in recent decades; however, a comprehensive understanding of relaxation …

Exploiting dynamic quantum circuits in a quantum algorithm with superconducting qubits

AD Córcoles, M Takita, K Inoue, S Lekuch, ZK Minev… - Physical Review Letters, 2021 - APS
To date, quantum computation on real, physical devices has largely been limited to simple,
time-ordered sequences of unitary operations followed by a final projective measurement …

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 …

Challenges and opportunities of near-term quantum computing systems

AD Córcoles, A Kandala, A Javadi-Abhari… - Proceedings of the …, 2019 - ieeexplore.ieee.org
The concept of quantum computing has inspired a whole new generation of scientists,
including physicists, engineers, and computer scientists, to fundamentally change the …

Reducing the impact of radioactivity on quantum circuits in a deep-underground facility

L Cardani, F Valenti, N Casali, G Catelani… - Nature …, 2021 - nature.com
As quantum coherence times of superconducting circuits have increased from nanoseconds
to hundreds of microseconds, they are currently one of the leading platforms for quantum …