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Reducing Qubit Energy Decay and Correlated Errors From Cosmic Rays in Quantum Processors
Reducing Qubit Energy Decay and Correlated Errors From Cosmic Rays in Quantum Processors
US patent number 10,998,486; issued May 4, 2021
US patent number 10,998,486; issued May 4, 2021
Saving superconducting quantum processors from qubit energy decay and correlated errors generated from gamma and cosmic Rays; Cosmic rays and natural radioactivity produce quasiparticle heat pulses that effectively kill quantum error correction. Structures are described that channel this energy away from qubits. This affects other solid-state qubits. arXiv:2012.06137 NPJQI publication
Superconducting Qubit with Tapered Junction Wiring
Superconducting Qubit with Tapered Junction Wiring
US patent number 11,038,094, issued June 15, 2021
US patent number 11,038,094, issued June 15, 2021
Optimal design of a superconducting transmon qubit with tapered wiring; Analytical formulas are presented for planar capacitors used in transmon design. Tapering of the wire connecting to the Josephson junction is shown to significantly lower its loss. arXiv:2104.01544
Qubit Readout
Qubit Control
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