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Quantum Communication and Quantum Information

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Quantum Science and Technology".

Deadline for manuscript submissions: 20 December 2025 | Viewed by 245

Special Issue Editors


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Guest Editor
Istituto Nazionale di Ricerca Metrologica, Torino, Italy
Interests: quantum optics; quantum key distribution; quantum foundations; quantum metrology

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Guest Editor Assistant
Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, 10135 Torino, Italy
Interests: quantum optics; entanglement; quantum zeno effect; weak measurement; quantum key distribution; quantum discord

Special Issue Information

Dear Colleagues,

We are pleased to invite you to contribute to this Special Issue on Quantum Communication and Quantum Information, an area at the intersection of physics, engineering, and information science that is rapidly transforming secure communication and computational paradigms. The principles of quantum mechanics have paved the way for revolutionary technologies such as quantum cryptography, quantum computing, and quantum networks, with profound implications for cybersecurity, data processing, and computation. Alongside these applied advancements, foundational research in quantum mechanics, quantum nonlocality, and the nature of quantum information continues to challenge our understanding of reality and influence the development of emerging quantum technologies. As both experimental and theoretical approaches evolve, it is essential to explore the interplay between fundamental quantum principles and real-world applications.

This Special Issue aims to bring together theoretical and experimental advances in quantum communication, quantum information processing, and the fundamental aspects of quantum mechanics. We encourage submissions that explore practical implementations of quantum technologies, as well as theoretical studies that deepen our understanding of quantum information theory and the foundational principles of quantum mechanics. The scope of this issue aligns with the journal's focus on electronics, communication systems, and emerging quantum technologies, providing a platform for novel research that contributes to the development and integration of quantum systems into real-world applications. Our goal is to compile a high-quality collection of at least 10 articles, which may also be published in book form if this number is reached. Suggested themes and article types for submissions:

In this Special Issue, original research articles and review papers are welcome. Research areas may include (but are not limited to) the following:

  • Quantum key distribution (QKD) and secure communication
  • Quantum cryptographic protocols and post-quantum security
  • Quantum networks, quantum internet architectures, and distributed quantum computing
  • Quantum teleportation and entanglement-based communication
  • Quantum error correction, fault tolerance, and quantum information storage
  • Quantum information theory and algorithm development
  • Hardware implementations of quantum communication and computation
  • Hybrid classical-quantum communication systems
  • Foundations of quantum mechanics, quantum nonlocality, and contextuality
  • Theoretical aspects of quantum information and its implications for physics

We look forward to receiving your contributions.

Dr. Alice Meda
Guest Editor

Dr. Salvatore Virzì
Guest Editor Assistant

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. Applied Sciences is an international peer-reviewed open access semimonthly 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

  • quantum communication
  • quantum information theory
  • quantum cryptography
  • quantum key distribution (QKD)
  • quantum networks
  • quantum entanglement
  • quantum error correction
  • foundations of quantum mechanics
  • quantum computing and algorithms
  • quantum nonlocality and contextuality

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Published Papers (1 paper)

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Research

34 pages, 1302 KiB  
Article
Integrated Information in Relational Quantum Dynamics (RQD)
by Arash Zaghi
Appl. Sci. 2025, 15(13), 7521; https://doi.org/10.3390/app15137521 - 4 Jul 2025
Viewed by 129
Abstract
We introduce a quantum integrated-information measure Φ for multipartite states within the Relational Quantum Dynamics (RQD) framework. Φ(ρ) is defined as the minimum quantum Jensen–Shannon distance between an n-partite density operator ρ and any product state over a bipartition of [...] Read more.
We introduce a quantum integrated-information measure Φ for multipartite states within the Relational Quantum Dynamics (RQD) framework. Φ(ρ) is defined as the minimum quantum Jensen–Shannon distance between an n-partite density operator ρ and any product state over a bipartition of its subsystems. We prove that its square root induces a genuine metric on state space and that Φ is monotonic under all completely positive trace-preserving maps. Restricting the search to bipartitions yields a unique optimal split and a unique closest product state. From this geometric picture, we derive a canonical entanglement witness directly tied to Φ and construct an integration dendrogram that reveals the full hierarchical correlation structure of ρ. We further show that there always exists an “optimal observer”—a channel or basis—that preserves Φ better than any alternative. Finally, we propose a quantum Markov blanket theorem: the boundary of the optimal bipartition isolates subsystems most effectively. Our framework unites categorical enrichment, convex-geometric methods, and operational tools, forging a concrete bridge between integrated information theory and quantum information science. Full article
(This article belongs to the Special Issue Quantum Communication and Quantum Information)
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