Qutrit Randomized Benchmarking
Name
PhysRevLett.126.210504.pdf
Description
Published version
Size
601.51 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Morvan, A
Ramasesh, VV
Blok, MS
Kreikebaum, JM
O’Brien, K
Chen, L
Mitchell, BK
Naik, RK
Santiago, DI
Siddiqi, I
Date Issued
2021
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Morvan, A, Ramasesh, VV, Blok, MS, Kreikebaum, JM, O’Brien, K et al. 2021. "Qutrit Randomized Benchmarking." Physical Review Letters, 126 (21).
Version
Final published version
Abstract
Ternary quantum processors offer significant potential computational advantages over conventional qubit technologies, leveraging the encoding and processing of quantum information in qutrits (three-level systems). To evaluate and compare the performance of such emerging quantum hardware it is essential to have robust benchmarking methods suitable for a higher-dimensional Hilbert space. We demonstrate extensions of industry standard randomized benchmarking (RB) protocols, developed and used extensively for qubits, suitable for ternary quantum logic. Using a superconducting five-qutrit processor, we find an average single-qutrit process infidelity of 3.8×10^{-3}. Through interleaved RB, we characterize a few relevant gates, and employ simultaneous RB to fully characterize crosstalk errors. Finally, we apply cycle benchmarking to a two-qutrit CSUM gate and obtain a two-qutrit process fidelity of 0.85. Our results present and demonstrate RB-based tools to characterize the performance of a qutrit processor, and a general approach to diagnose control errors in future qudit hardware.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.126.210504
