Improving readout of a superconducting qubit using the path signature method

Cao, Shuxiang, Shao, Zhen, Zheng, Jian-Qing, Alghadeer, Mohammed, Fasciati, Simone D., Piscitelli, Michele, Taravati, Sajjad, Bakr, Mustafa S., Lyons, Terry and Leek, Peter J. (2024) Improving readout of a superconducting qubit using the path signature method. Bulletin of the American Physical Society, [G47.00004].

Abstract

One major challenge in quantum computing is to implement fast, high-accuracy quantum state readout. For superconducting circuits, this problem reduces to a time series classification problem [1]. We propose that using path signature methods to extract features can enhance existing techniques for quantum state discrimination [2]. We demonstrate the superior performance of our proposed approach over conventional methods in distinguishing three different quantum states on real experimental data from a superconducting transmon qubit.

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Contributors

Author: Sajjad Taravati

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