中文版 | English
Title

Experimental measurement of bipartite entanglement using parameterized quantum circuits

Author
Corresponding AuthorLu, Dawei; Xin, Tao
Joint first authorXue, Shunzhong; Huang, Yulei
Publication Years
2022-08-01
DOI
Source Title
ISSN
1674-7348
EISSN
1869-1927
Volume65Issue:8
Abstract

Entanglement in quantum systems plays a crucial role in various quantum information tasks. Measuring entanglement has been an important issue in both experiments and theories. In this work, we use parameterized quantum circuits (PQCs) to diagonalize density matrices of quantum states and obtain entanglement by only measuring the diagonal elements. With this method, full quantum state tomography can be bypassed, greatly reducing the number of measurements. A comprehensive characterization of entanglement was performed by using Renyi entropy and partially transposed moments. Mutual information, calculated from entropy is also used to characterize dynamical quantum phase transitions. We experimentally demonstrated the method on a four-qubit nuclear magnetic resonance quantum simulator. Our results agree with the theoretical descriptions. The measurement complexity of our PQC-based method grows linearly with the number of diagonal elements in the density matrix, a square root reduction over the full quantum tomography. The proposed method can have great potential in quantum systems with a large number of particles.

Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
Corresponding
Funding Project
National Key Research and Development Program of China[
WOS Research Area
Physics
WOS Subject
Physics, Multidisciplinary
WOS Accession No
WOS:000812513100002
Publisher
EI Accession Number
20222512248707
EI Keywords
Entropy ; Matrix Algebra ; Phase Transitions ; Quantum Entanglement ; Quantum Optics ; Tomography
ESI Classification Code
Thermodynamics:641.1 ; Pulse Circuits:713.4 ; Light/Optics:741.1 ; Imaging Techniques:746 ; Physical Chemistry:801.4 ; Algebra:921.1 ; Quantum Theory ; Quantum Mechanics:931.4
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/343285
DepartmentInstitute for Quantum Science and Engineering
理学院_物理系
Affiliation
1.Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
2.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Guangdong Prov Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China
6.Zhejiang Lab, Res Ctr Quantum Sensing, Hangzhou 311121, Peoples R China
7.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
8.Beijing Natl Res Ctr Informat Sci & Technol, Beijing 100084, Peoples R China
9.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China
First Author AffilicationInstitute for Quantum Science and Engineering;  Department of Physics
Corresponding Author AffilicationInstitute for Quantum Science and Engineering;  Department of Physics
Recommended Citation
GB/T 7714
Xue, Shunzhong,Huang, Yulei,Zhao, Dafa,et al. Experimental measurement of bipartite entanglement using parameterized quantum circuits[J]. Science China-Physics Mechanics & Astronomy,2022,65(8).
APA
Xue, Shunzhong.,Huang, Yulei.,Zhao, Dafa.,Wei, Chao.,Li, Jun.,...&Long, Gui-Lu.(2022).Experimental measurement of bipartite entanglement using parameterized quantum circuits.Science China-Physics Mechanics & Astronomy,65(8).
MLA
Xue, Shunzhong,et al."Experimental measurement of bipartite entanglement using parameterized quantum circuits".Science China-Physics Mechanics & Astronomy 65.8(2022).
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