Universal compressive characterization of quantum dynamics

Recent quantum technologies utilize complex multidimensional processes that govern the dynamics of quantum systems. We develop an adaptive diagonal-element-probing compression technique that feasibly characterizes any unknown quantum processes using much fewer measurements compared to conventional m...

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Published in:arXiv.org 2020-05
Main Authors: Kim, Yosep, Teo, Yong Siah, Ahn, Daekun, Dong-Gil Im, Young-Wook, Cho, Leuchs, Gerd, Sanchez-Soto, Luis L, Jeong, Hyunseok, Yoon-Ho, Kim
Format: Article
Language:English
Subjects:
Adaptive systems
Cost analysis
Numerical analysis
Robustness (mathematics)
Subsystems
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container_title arXiv.org
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creator Kim, Yosep
Teo, Yong Siah
Ahn, Daekun
Dong-Gil Im
Young-Wook, Cho
Leuchs, Gerd
Sanchez-Soto, Luis L
Jeong, Hyunseok
Yoon-Ho, Kim
description Recent quantum technologies utilize complex multidimensional processes that govern the dynamics of quantum systems. We develop an adaptive diagonal-element-probing compression technique that feasibly characterizes any unknown quantum processes using much fewer measurements compared to conventional methods. This technique utilizes compressive projective measurements that are generalizable to arbitrary number of subsystems. Both numerical analysis and experimental results with unitary gates demonstrate low measurement costs, of order \(O(d^2)\) for \(d\)-dimensional systems, and robustness against statistical noise. Our work potentially paves the way for a reliable and highly compressive characterization of general quantum devices.
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subjects Adaptive systems
Cost analysis
Numerical analysis
Robustness (mathematics)
Subsystems
title Universal compressive characterization of quantum dynamics
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