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 …

Noise-resilient edge modes on a chain of superconducting qubits

X Mi, M Sonner, MY Niu, KW Lee, B Foxen, R Acharya… - Science, 2022 - science.org
Inherent symmetry of a quantum system may protect its otherwise fragile states. Leveraging
such protection requires testing its robustness against uncontrolled environmental …

Coherent manipulation of an Andreev spin qubit

M Hays, V Fatemi, D Bouman, J Cerrillo, S Diamond… - Science, 2021 - science.org
Two promising architectures for solid-state quantum information processing are based on
electron spins electrostatically confined in semiconductor quantum dots and the collective …

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 …

Coherent manipulation of Andreev states in superconducting atomic contacts

C Janvier, L Tosi, L Bretheau, ÇÖ Girit, M Stern… - Science, 2015 - science.org
Coherent control of quantum states has been demonstrated in a variety of superconducting
devices. In all of these devices, the variables that are manipulated are collective …

Direct microwave measurement of Andreev-bound-state dynamics in a semiconductor-nanowire Josephson junction

M Hays, G De Lange, K Serniak, DJ Van Woerkom… - Physical review …, 2018 - APS
The modern understanding of the Josephson effect in mesosopic devices derives from the
physics of Andreev bound states, fermionic modes that are localized in a superconducting …

Loss mechanisms and quasiparticle dynamics in superconducting microwave resonators made of thin-film granular aluminum

L Grünhaupt, N Maleeva, ST Skacel, M Calvo… - Physical review …, 2018 - APS
Superconducting high kinetic inductance elements constitute a valuable resource for
quantum circuit design and millimeter-wave detection. Granular aluminum (grAl) in the …

Measurement and control of quasiparticle dynamics in a superconducting qubit

C Wang, YY Gao, IM Pop, U Vool, C Axline… - Nature …, 2014 - nature.com
Superconducting circuits have attracted growing interest in recent years as a promising
candidate for fault-tolerant quantum information processing. Extensive efforts have always …

Coexistence of nonequilibrium density and equilibrium energy distribution of quasiparticles in a superconducting qubit

T Connolly, PD Kurilovich, S Diamond, H Nho… - Physical Review Letters, 2024 - APS
The density of quasiparticles typically observed in superconducting qubits exceeds the
value expected in equilibrium by many orders of magnitude. Can this out-of-equilibrium …

Non-poissonian quantum jumps of a fluxonium qubit due to quasiparticle excitations

U Vool, IM Pop, K Sliwa, B Abdo, C Wang, T Brecht… - Physical review …, 2014 - APS
As the energy relaxation time of superconducting qubits steadily improves, nonequilibrium
quasiparticle excitations above the superconducting gap emerge as an increasingly relevant …