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Latest Research on Quantum Communication and Quantum Randomness Generation

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

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 1791

Special Issue Editors


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Guest Editor
Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Padova, 35131 Padova, Italy
Interests: quantum information; quantum key distribution; quantum random number generators
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
TESAF Department, University of Padua, Viale Università 16, 35020 Legnaro, Italy
Interests: entropy; chaotic oscillator; randomness; quantum key distribution; quantum communication

Special Issue Information

Dear Colleagues,

Quantum technologies have advanced at a rapid pace, with quantum communication and quantum randomness generation being two of the most mature. By exploiting the unique properties of quantum systems, they provide significant advantages in a wide range of applications, including unconditionally secure communication and the generation of truly unpredictable and private random numbers for simulations or cryptography. Solutions have progressed dramatically from laboratory experiments to commercial devices, but research in these fields is still ongoing, with novel theoretical and experimental improvements allowing for greater distances, higher speeds, and more robust and secure protocols. This Special Issue aims to collect theoretical and experimental contributions exploring the most recent developments in this fields.

Topics of interest include (but are not limited to):

  • Discrete and continuous variable quantum key distribution;
  • Fiber and free-space quantum communication;
  • Quantum networks;
  • Quantum random number generators;
  • Device-independent and semi-device-independent protocols;
  • Quantum direct communication;
  • Quantum bit commitment;
  • Quantum digital signatures;
  • Quantum hacking, side-channel attacks and countermeasures;
  • Integrated quantum photonics.

Dr. Marco Avesani
Dr. Davide G. Marangon
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. 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 key distribution
  • quantum random number generators
  • free-space quantum communication
  • quantum networks
  • device-independent
  • semi-device-independent
  • integrated photonics

Published Papers (1 paper)

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Research

16 pages, 3646 KiB  
Article
Superactivating Bound Entanglement in Quantum Networks via Quantum Zeno Dynamics and a Novel Algorithm for Optimized Zeno Evolution
by Fatih Ozaydin, Veysel Bayrakci, Azmi Ali Altintas and Cihan Bayindir
Appl. Sci. 2023, 13(2), 791; https://doi.org/10.3390/app13020791 - 6 Jan 2023
Cited by 1 | Viewed by 1238
Abstract
An arbitrary amount of entanglement shared among nodes of a quantum network might be nondistillable if the nodes lack the information on the entangled Bell pairs they share. Making such a system distillable, which is called the superactivation of bound entanglement (BE), was [...] Read more.
An arbitrary amount of entanglement shared among nodes of a quantum network might be nondistillable if the nodes lack the information on the entangled Bell pairs they share. Making such a system distillable, which is called the superactivation of bound entanglement (BE), was shown to be possible through systematic quantum teleportation between the nodes, requiring the implementation of controlled-gates scaling with the number of nodes. In this work, we show in two scenarios that the superactivation of BE is possible if nodes implement the proposed local quantum Zeno strategies based on only single qubit rotations and simple threshold measurements. In the first scenario we consider, we obtain a two-qubit distillable entanglement system as in the original superactivation proposal. In the second scenario, we show that superactivation can be achieved among the entire network of eight qubits in five nodes. In addition to obtaining all-particle distillable entanglement, the overall entanglement of the system in terms of the sum of bipartite cuts is increased. We also design a general algorithm with variable greediness for optimizing the QZD evolution tasks. Implementing our algorithm for the second scenario, we show that a significant improvement can be obtained by driving the initial BE system into a maximally entangled state. We believe our work contributes to quantum technologies from both practical and fundamental perspectives bridging nonlocality, bound entanglement and the quantum Zeno dynamics among a quantum network. Full article
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