Impact of ionizing radiation on superconducting qubit coherence

  title={Impact of ionizing radiation on superconducting qubit coherence},
  author={A. Vepsalainen and Amir H. Karamlou and J. Orrell and Akshunna S. Dogra and B. Loer and F. Vasconcelos and David K. Kim and A. Melville and B. Niedzielski and J. Yoder and S. Gustavsson and J. Formaggio and B. VanDevender and W. Oliver},
  pages={551 - 556}
Technologies that rely on quantum bits (qubits) require long coherence times and high-fidelity operations1. Superconducting qubits are one of the leading platforms for achieving these objectives2,3. However, the coherence of superconducting qubits is affected by the breaking of Cooper pairs of electrons4–6. The experimentally observed density of the broken Cooper pairs, referred to as quasiparticles, is orders of magnitude higher than the value predicted at equilibrium by the Bardeen–Cooper… Expand
Resolving catastrophic error bursts from cosmic rays in large arrays of superconducting qubits
Matt McEwen, 2 Lara Faoro, Kunal Arya, Andrew Dunsworth, Trent Huang, Seon Kim, Brian Burkett, Austin Fowler, Frank Arute, Joseph C. Bardin, 4 Andreas Bengtsson, Alexander Bilmes, Bob B. Buckley,Expand
CUORE Opens the Door to Tonne-scale Cryogenics Experiments
The past few decades have seen major developments in the design and operation of cryogenic particle detectors. This technology offers an extremely good energy resolution — comparable to semiconductorExpand
Circuit quantum electrodynamics
Quantum mechanical effects at the macroscopic level were first explored in Josephson junction-based superconducting circuits in the 1980’s. In the last twenty years, the emergence of quantumExpand
Continuous Real-Time Detection of Quasiparticle Trapping
Nonequilibrium quasiparticles are ubiquitous in superconducting electronics. These quasiparticles can trap in the internal Andreev bound states of a phase-biased Josephson junction, providing aExpand
Continuous Real-Time Detection of Quasiparticle Trapping in Aluminum Nanobridge Josephson Junctions
X iv :2 10 7. 07 12 5v 2 [ co nd -m at .m es -h al l] 3 S ep 2 02 1 Continuous Real-Time Detection of Quasiparticle Trapping in Aluminum Nanobridge Josephson Junctions J. T. Farmer, 2 A. Zarassi, 2Expand
Correlated charge noise and relaxation errors in superconducting qubits.
A superconducting multiqubit circuit is characterized and it is found that charge noise in the chip is highly correlated on a length scale over 600 micrometres; moreover, discrete charge jumps are accompanied by a strong transient reduction of qubit energy relaxation time across the millimetre-scale chip. Expand
Discovery of Nb hydride precipitates in superconducting qubits
We report the first evidence of the formation of niobium hydrides within niobium films on silicon substrates in superconducting qubits fabricated at Rigetti Computing. We combine complementaryExpand
Entanglement Across Separate Silicon Dies in a Modular Superconducting Qubit Device
Qubit Device Alysson Gold,1, *) JP Paquette,1, *) Anna Stockklauser,1 Matthew J. Reagor,1 M. Sohaib Alam,1 Andrew Bestwick,1 Nicolas Didier,1 Ani Nersisyan,1 Feyza Oruc,1 Armin Razavi,1 BenExpand
Exponential suppression of bit or phase errors with cyclic error correction
  • Zijun Kevin J. Juan Alexander N. Andrew Daniel Chris Mat Chen Satzinger Atalaya Korotkov Dunsworth Sank Qui, Zijun Chen, +94 authors J. Kelly
  • Medicine
  • Nature
  • 2021
One-dimensional repetition codes embedded in a two-dimensional grid of superconducting qubits are implemented that demonstrate exponential suppression of bit-flip or phase-Flip errors, reducing logical error per round more than 100-fold when increasing the number of qubits from 5 to 21. Expand
Gate-Assisted Phase Fluctuations in All-Metallic Josephson Junctions
The discovery that a gate electrode suppresses the supercurrent in purely metallic systems is missing a complete physical understanding of the mechanisms at play. We here study the origin of thisExpand


Reducing the impact of radioactivity on quantum circuits in a deep-underground facility
Operating in a deep-underground lead-shielded cryostat decreases the quasiparticle burst rate by a factor thirty and reduces dissipation up to a factor four, showcasing the importance of radiation abatement in future solid-state quantum hardware. Expand
A Quantum Engineer's Guide to Superconducting Qubits
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 quantum circuits. OverExpand
Direct Dispersive Monitoring of Charge Parity in Offset-Charge-Sensitive Transmons
A striking characteristic of superconducting circuits is that their eigenspectra and intermode coupling strengths are well predicted by simple Hamiltonians representing combinations of quantumExpand
Error mitigation extends the computational reach of a noisy quantum processor
This work applies the error mitigation protocol to mitigate errors in canonical single- and two-qubit experiments and extends its application to the variational optimization of Hamiltonians for quantum chemistry and magnetism. Expand
Quantum supremacy using a programmable superconducting processor
Quantum supremacy is demonstrated using a programmable superconducting processor known as Sycamore, taking approximately 200 seconds to sample one instance of a quantum circuit a million times, which would take a state-of-the-art supercomputer around ten thousand years to compute. Expand
Superconducting Qubits: Current State of Play
Several of the recent experimental advances in qubit hardware, gate implementations, readout capabilities, early NISQ algorithm implementations, and quantum error correction using superconducting qubits are discussed. Expand
A Search for Lepton Number Violation via 0νββ Decay of 130Te
  • Phys. Rev. Lett. 120, 132501, DOI: 10.1103/PhysRevLett. 120.132501
  • 2018
APS : Review of Particle Physics, 2018
The complete Review(both volumes) is published online on the website of the Particle Data Group( and in a journal. Volume 1 is available in print as thePDG Book. AParticle PhysicsExpand
Extending the computational reach of a noisy superconducting quantum processor
Quantum computation, a completely different paradigm of computing, benefits from theoretically proven speed-ups for certain problems and opens up the possibility of exactly studying the properties ofExpand
First Results from CUORE: A Search for Lepton Number Violation via 0νββ Decay of ^{130}Te.
The CUORE experiment, a ton-scale cryogenic bolometer array, recently began operation at the Laboratori Nazionali del Gran Sasso in Italy, and it is applied for the first time to a high-sensitivity search for a lepton-number-violating process: ^{130}Te neutrinoless double-beta decay. Expand