9-15 June 2018
Woodlands Conference Center
America/New_York timezone
**** See you at Real Time 2020 ****

Scalable Self-Adaptive Synchronous Triggering System in Superconducting Quantum Computing

12 Jun 2018, 14:40
1h 30m
Woodlands Conference Center

Woodlands Conference Center

159 Visitor Center Dr, Williamsburg, VA 23185
Poster presentation Control, Monitoring,Test and Real Time Diagnostics Systems Poster 1

Speaker

Dr Jin Lin (Chinese Academy of Sciences (CAS) Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China)

Description

Quantum computers can solve some specific problems which are deeply believed to be intractable for classical computers. However, building large-scale quantum computers should face lots of challenges. The high-precision synchronous control of all qubits is one of the key techniques we address.
Our system serves the Superconducting quantum computing which requires plenty of arbitrary waveform generators (AWG) to work synchronously to drive the quantum processor. The system can achieve the synchronization trigger of all AWGs.
Firstly, the clock generation and distribution system is designed to provide synchronous high-performance reference clocks for each AWG with the synchronized precision less than 20 ps and clock jitters under 200 fs for the initial test, and it can be extended by increasing fan-out units. Next, we design a set of trigger generation firmware elaborately in FPGA, which is controlled by central-computer to generate triggers with configurable counts and intervals. Then the generated trigger fan out to 48 edge-aligned triggers to each AWG as the start signal via a star-like framework which is hardware-compatible with the clock system. Due to routing delay of trigger, reference clock is very likely to capture the rising-edge of the trigger causing a meta-stable state which makes AWGs unsynchronized. Therefore, we develop a self-adaptive firmware that can automatically adjust the trigger, once the meta-stability happens.
With this system, all AWGs can work synchronously, with a synchronization skew less than 20 ps. And the total number of AWGs can be expanded easily in order to manipulate more superconducting qubits.

Minioral Yes
Speaker Lihua Sun
Description Trigger Sync
Institute USTC
Country China

Primary author

Ms Lihua Sun (Department of Modern Physics, University of Science and Technology of China)

Co-authors

Dr Futian Liang (University of Science and Technology of China) Dr Jin Lin (Chinese Academy of Sciences (CAS) Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China) Yu Xu (ustc) Cheng Guo (University of Science and Technology of China) Mr ShengKai Liao (Chinese Academy of Sciences (CAS) Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China) Mr ChengZhi Peng (Chinese Academy of Sciences (CAS) Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China)

Presentation Materials

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