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Parameter-Parallel Distributed Variational Quantum Algorithm
by Yun-Fei Niu, Shuo Zhang, Chen Ding, Wan-Su Bao, He-Liang Huang
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Submission summary
| Authors (as registered SciPost users): | He-Liang Huang |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202301_00022v1 (pdf) |
| Date accepted: | 2023-03-30 |
| Date submitted: | 2023-01-16 13:52 |
| Submitted by: | Huang, He-Liang |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
Variational quantum algorithms (VQAs) have emerged as a promising near-term technique to explore practical quantum advantage on noisy intermediate-scale quantum (NISQ) devices. However, the inefficient parameter training process due to the incompatibility with backpropagation and the cost of a large number of measurements, posing a great challenge to the large-scale development of VQAs. Here, we propose a parameter-parallel distributed variational quantum algorithm (PPD-VQA), to accelerate the training process by parameter-parallel training with multiple quantum processors. To maintain the high performance of PPD-VQA in the realistic noise scenarios, a alternate training strategy is proposed to alleviate the acceleration attenuation caused by noise differences among multiple quantum processors, which is an unavoidable common problem of distributed VQA. Besides, the gradient compression is also employed to overcome the potential communication bottlenecks. The achieved results suggest that the PPD-VQA could provide a practical solution for coordinating multiple quantum processors to handle large-scale real-word applications.
Author comments upon resubmission
List of changes
We have merged the reply document and the revised manuscript into one document (due to the fact that our reply document has some figures in it, which is not supported by the SciPost submission system website for filling in). Therefore, all responses are in the file we uploaded, thank you!
Published as SciPost Phys. 14, 132 (2023)
Reports on this Submission
Report 2 by Hao Wang on 2023-3-19 (Invited Report)
Report
In this revision, the authors have worked on every bit of my previous comment very carefully, and with the newly added appendices A and B, I think this version looks very precise and solid.
I checked through the appendices and the modified parts of the main text and did not spot any major issues. Only some minor things:
* I think you missed the right parentheses in the second line of the centered equation in Appendix A.
* In Appendix B, you might want to enlarge some parentheses/brackets to make them look a bit better.
But the above tiny comments can be easily resolved in your final version.
Again, I'd like to address that the authors did a good work of providing the upper bound for the bias term of the gradient.
In all, I recommend this manuscript for publication.
Anonymous on 2023-01-17 [id 3243]
Sorry, we forgot to update a figure in yesterday's submission version, please read our updated version. Thanks!
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Updated_merged_files_reply_and_maintext.pdf