Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session R68: Control and Calibration Tools for Scalable Quantum Computing
8:00 AM–11:00 AM,
Thursday, March 5, 2020
Room: Four Seasons 4
Sponsoring
Unit:
DQI
Chair: Robin Blume-Kohout, Sandia National Laboratories
Abstract: R68.00009 : High-Fidelity, Scalable Quantum-Classical Control Interface using Photonics*
Presenter:
Jacky Chan
(Lawrence Livermore Natl Lab)
Authors:
Jacky Chan
(Lawrence Livermore Natl Lab)
Apurva S. Gowda
(Lawrence Livermore Natl Lab)
Peter T. S. DeVore
(Lawrence Livermore Natl Lab)
Brandon W. Buckley
(Lawrence Livermore Natl Lab)
Jonathan L DuBois
(Lawrence Livermore Natl Lab)
Jason Chou
(Lawrence Livermore Natl Lab)
Effective control signal generation is essential to extending the circuit depth by improving classical control over the quantum system. To address this need, we propose an RF-photonic implementation of a QC control interface, via high-fidelity, scalable quantum drive signal generation and fiber optic transport of this signal to the qubit. By increasing the signal dynamic range and bandwidth, the time per quantum gate operation can be reduced, thus widening the circuit depth bottleneck. Additionally, replacing RF cabling with optical fiber reduces waste heat and thermalization issues, improving scalability to larger qubit systems. We show experimental results from a single-channel system and discuss its extension to a multi-channel system via simulations.
*Prepared by LLNL under Contract DE-AC52-07NA27344.
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