Modeling and testing novel quasiparticle traps on superconducting qubits via geometric gap engineering
ORAL
Abstract
Non-equilibrium quasiparticles have been identified as a major decoherence source in su-
perconducting qubits. Strategies to mitigate the quasiparticle loss are highly demanded. We
propose an improved microscopic model of quasiparticle diffusion that is not constrained to
equilibrium energies. Based on this model, we explore new qubit architectures and demon-
strate the improvement of qubit relaxation and dephasing times.
perconducting qubits. Strategies to mitigate the quasiparticle loss are highly demanded. We
propose an improved microscopic model of quasiparticle diffusion that is not constrained to
equilibrium energies. Based on this model, we explore new qubit architectures and demon-
strate the improvement of qubit relaxation and dephasing times.
* This material is based upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Superconducting Quantum Materials and Systems Center (SQMS) under contract number DE-AC02-07CH11359.
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Presenters
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Ugur Alyanak
Fermilab, University of Chicago
Authors
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Ugur Alyanak
Fermilab, University of Chicago
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Ziwen Huang
Fermilab
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Wei-Ting Lin
University of Michigan
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Xinyuan You
Fermilab
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Alexander Romanenko
Fermilab, Fermi National Accelerator Laboratory
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Anna Grassellino
Fermilab, Fermi National Accelerator Laboratory
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Young-Kee Kim
University of Chicago, APS President 2024, University of Chicago
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Shaojiang Zhu
Fermilab, Fermi National Accelerator Laboratory