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Symmetry
Special Issues
Symmetry in Quantum Optics and Quantum Information Research
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Symmetry in Quantum Optics and Quantum Information Research

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 1135

Special Issue Editors

Prof. Dr. Hong Guo

E-Mail Website
Guest Editor
1. State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Peking University, Beijing 100871, China
2. Center for Quantum Information Technology, Peking University, Beijing 100871, China
Interests: quantum optics; quantum information technology; magnetometer; quantum time-frequency transfer; quantum key distribution; quantum open system
Dr. Ziyang Chen

E-Mail Website
Guest Editor
1. State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Peking University, Beijing 100871, China
2. Center for Quantum Information Technology, Peking University, Beijing 100871, China
Interests: quantum key distribution; quantum random number generation; quantum information theory
Special Issues, Collections and Topics in MDPI journals
Dr. Xiangyu Wang

E-Mail Website
Guest Editor
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
Interests: quantum information; quantum cryptography; quantum key distribution; quantum random number generator; quantum network
Prof. Dr. Qiong Li

E-Mail Website
Guest Editor
School of Cyberspace Science, Faculty of Computing, Harbin Institute of Technology, Harbin 150080, China
Interests: quantum cryptography; quantum key distribution; discrete variable; information processing
Special Issues, Collections and Topics in MDPI journals
Dr. Bingjie Xu

E-Mail Website
Guest Editor
Science and Technology on Communication Security Laboratory, Institute of Southwestern Communication, Chengdu, China
Interests: quantum cryptography; quantum key distribution; quantum random number generation

Special Issue Information

Dear Colleagues,

Quantum measurement has the advantages of high accuracy, high sensitivity, wide response range, and easy integration, which will break the classical measurement limit. Quantum precision measurement and related quantum information technology improve the methods of information acquisition and transmission, providing potentials for experiments and applications with high precision, and open a pathway for large-scale and high-performance quantum networks.

In recent years, technologies, including atomic magnetometer, atomic clock, optical frequency comb, Rydberg atom, and quantum weak measurement, have greatly enriched high-precision measurement methods. Meanwhile, fields including quantum key distribution, quantum time–frequency transfer, and quantum ranging have enhanced information transmission. These studies not only bring excellent technical performances but also drive the development of next-generation metrological technologies. In fact, a lot of symmetries exist in quantum technologies.

This Special Issue aims to serve as a platform for the presentation of new and improved techniques of quantum precision measurement and related quantum information technology, as well as the symmetric properties of these fields. In particular, the theoretical or experimental investigation and improvement of quantum information technology and other extended topics fall within the scope of this Special Issue.

Prof. Dr. Hong Guo
Dr. Ziyang Chen
Dr. Xiangyu Wang
Prof. Dr. Qiong Li
Dr. Bingjie Xu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • atomic magnetometer
  • quantum time–frequency transfer
  • quantum key distribution
  • quantum open system
  • atomic clock
  • optical frequency comb
  • Rydberg atom
  • quantum weak measurement
  • quantum image
  • quantum information

Published Papers (1 paper)

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Review

18 pages, 708 KiB  
Review
Quantum Tomography: From Markovianity to Non-Markovianity
by Tian Luan, Zetong Li, Congcong Zheng, Xueheng Kuang, Xutao Yu and Zaichen Zhang
Symmetry 2024, 16(2), 180; https://doi.org/10.3390/sym16020180 - 02 Feb 2024
Viewed by 657
Abstract
The engineering of quantum computers requires the reliable characterization of qubits, quantum operations, and even the entire hardware. Quantum tomography is an indispensable framework in quantum characterization, verification, and validation (QCVV), which has been widely accepted by researchers. According to the tomographic target, [...] Read more.
The engineering of quantum computers requires the reliable characterization of qubits, quantum operations, and even the entire hardware. Quantum tomography is an indispensable framework in quantum characterization, verification, and validation (QCVV), which has been widely accepted by researchers. According to the tomographic target, quantum tomography can be categorized into quantum state tomography (QST), quantum process tomography (QPT), gate set tomography (GST), process tensor tomography (PTT), and instrument set tomography (IST). Standard quantum tomography toolkits generally consist of basic linear inverse methods and statistical maximum likelihood estimation (MLE)-based methods. Furthermore, the performance of standard methods, including effectiveness and efficiency, has been further developed by exploiting Bayesian estimation, neural networks, matrix completion techniques, etc. In this review, we introduce the fundamental quantum tomography techniques, including QST, QPT, GST, PTT, and IST. We first introduce the details of basic linear inverse methods. Then, the framework of MLE methods with constraints is summarized. Finally, we briefly introduce recent further research in developing the performance of tomography, utilizing some symmetry properties of the target. This review provides a primary getting-start in developing quantum tomography, which promotes quantum computer development. Full article
(This article belongs to the Special Issue Symmetry in Quantum Optics and Quantum Information Research)
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