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Optics
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Advances in Optical Quantum Communication Technology
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Advances in Optical Quantum Communication Technology

A special issue of Optics (ISSN 2673-3269). This special issue belongs to the section "Photonics and Optical Communications".

Deadline for manuscript submissions: closed (20 September 2022) | Viewed by 6229

Special Issue Editors

Dr. Costantino Agnesi

E-Mail Website
Guest Editor
Department of Information Engineering, University of Padua, 35122 Padova, Italy
Interests: quantum communication; quantum key distribution; quantum entanglement; free-space communication systems
Dr. Alberto Santamato

E-Mail Website
Guest Editor
Photonic Networks & Technologies, CNIT National inter-university consortium for telecommunications, Pisa, Italy
Interests: integrated quantum photonics; single photon sources; quantum key distribution; entanglement

Special Issue Information

Dear colleagues,

Quantum communication promises to efficiently solve many of the existing problems in classical communication by exploiting the quantum properties of photons. For example, quantum optical communications can guarantee unconditional security between two or more parties thanks to Heisenberg's uncertainty principle and quantum entanglement. Being one of the main pillars of quantum technologies, it has received much attention from both the academic and industrial worlds. Indeed, the versatility of off-the-shelf optical components and the rapidly advancing integrated photonics technology has opened the way to applications ranging from free-space quantum communication and fiber-based intracity quantum networks to satellite quantum communications. The Optics Editorial Office has decided to organize this Special Issue to give researchers a platform with which to publish novel experimental and theoretical results in optical methods for quantum communications.

The aim of this Special Issue is to cover the following topics, but it is not limited to these:

  • Discrete variables and continuous variables: quantum key distribution;
  • Quantum secure direct communication and related protocols;
  • Quantum digital signatures;
  • Novel quantum communication protocols;
  • Integrated photonics for quantum communication;
  • The generation and exploitation of quantum entanglement;
  • Novel generation schemes for optical qubits;
  • Quantum communication field trails;
  • Free-space communication methods for quantum communication.

Dr. Costantino Agnesi
Dr. Alberto Santamato
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. Optics is an international peer-reviewed open access quarterly 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 1200 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

  • quantum optics 
  • quantum communication
  • quantum key distribution
  • quantum entanglement
  • integrated photonics
  • free-space communication

Published Papers (3 papers)

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Research

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8 pages, 3381 KiB  
Article
Quantum Network Intelligent Management System
by Iván García-Cobo
Optics 2022, 3(4), 430-437; https://0-doi-org.brum.beds.ac.uk/10.3390/opt3040036 - 15 Nov 2022
Viewed by 1341
Abstract
Quantum network materializes the paradigm change caused by the depletion of classical computation. Quantum networks have been built gathering reliable quantum repeaters connected by optical fiber networks. The need to build robust and resilient networks against hacking attacks is fundamental in the design [...] Read more.
Quantum network materializes the paradigm change caused by the depletion of classical computation. Quantum networks have been built gathering reliable quantum repeaters connected by optical fiber networks. The need to build robust and resilient networks against hacking attacks is fundamental in the design of the future quantum Internet, detecting structural security as the major issue in the current development of the technology. A network management method is proposed to achieve its real-time adaptation and to protect itself against sabotage or accidents that render part of the network or its nodes useless. Full article
(This article belongs to the Special Issue Advances in Optical Quantum Communication Technology)
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18 pages, 796 KiB  
Article
Tripartite Quantum Key Distribution Implemented with Imperfect Sources
by Comfort Sekga and Mhlambululi Mafu
Optics 2022, 3(3), 191-208; https://0-doi-org.brum.beds.ac.uk/10.3390/opt3030019 - 21 Jun 2022
Cited by 4 | Viewed by 1662
Abstract
Multipartite quantum key distribution (QKD) is a promising area of quantum networks that provides unconditional secret keys among multiple parties, enabling only legitimate users to decrypt the encrypted message. However, security proofs of existing multipartite QKD typically assume perfect state preparation devices of [...] Read more.
Multipartite quantum key distribution (QKD) is a promising area of quantum networks that provides unconditional secret keys among multiple parties, enabling only legitimate users to decrypt the encrypted message. However, security proofs of existing multipartite QKD typically assume perfect state preparation devices of legitimate users and neglect the relative rotation of reference frames. These presumptions are, nevertheless, very difficult to meet in practice, and thus the security of current multipartite QKD implementations is not guaranteed. By combining the idea of a loss tolerant technique, introduced by Tamaki et al. (K. Tamaki et al., Phys. Rev. A, 90, 052314, 2014), and the concept of a reference frame-independent protocol, we propose a three-party QKD protocol that considers state preparation flaws and the slow drift of reference frames. Through a numerical simulation, the influence of misaliged reference frames on the protocol’s stability was examined by drifting reference frames through angles β=π/5, β=π/6 and β=π/7. In addition, the performance of the proposed protocol was examined for the encoding flaws set at δ=0.35, δ=0.20, and δ=0.10. The results show that the protocol is robust against state preparation flaws, and is insignificantly impacted by misalignment of the reference frames because the achieved transmission distances and secret key rates are comparable to the perfect scenarios. This work dramatically contributes toward the realization of practical and secure multipartite QKD. The proposed protocol has direct applications in quantum communication network environments that involve unknown and slowly varying reference frames, web conferences, and online communications. Full article
(This article belongs to the Special Issue Advances in Optical Quantum Communication Technology)
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Review

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14 pages, 317 KiB  
Review
The Rationale for the Optimal Continuous-Variable Quantum Key Distribution Protocol
by Roman Goncharov, Irina Vorontsova, Daniil Kirichenko, Ilya Filipov, Iurii Adam, Vladimir Chistiakov, Semyon Smirnov, Boris Nasedkin, Boris Pervushin, Daria Kargina, Eduard Samsonov and Vladimir Egorov
Optics 2022, 3(4), 338-351; https://0-doi-org.brum.beds.ac.uk/10.3390/opt3040030 - 21 Sep 2022
Cited by 4 | Viewed by 1918
Abstract
This article describes the current technical level of developments in the field of continuous-variable quantum key distribution (CV-QKD). Various classifications are described, the criteria are analyzed, and the optimal protocol is selected. The analysis is focused around device-dependent schemes with a theoretical emphasis, [...] Read more.
This article describes the current technical level of developments in the field of continuous-variable quantum key distribution (CV-QKD). Various classifications are described, the criteria are analyzed, and the optimal protocol is selected. The analysis is focused around device-dependent schemes with a theoretical emphasis, and therefore, a detailed analysis of device-independent CV-QKD and side-channel attacks is out of the scope of the work. However, the latter, one way or another, is taken into account when describing possible classifications. The choice of the optimal protocol was carried out, first of all, from the potential possibility of integration into existing network telecommunication infrastructures. Predominantly, the general classification is carried out in such a way that it is possible to draw up a specific protocol, depending on the task of implementation. Full article
(This article belongs to the Special Issue Advances in Optical Quantum Communication Technology)
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