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Entropy
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Quantum Correlations Used in Quantum Technologies
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Quantum Correlations Used in Quantum Technologies

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Quantum Information".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 2602

Special Issue Editor

Dr. Iulia Ghiu

E-Mail Website
Guest Editor
Faculty of Physics, University of Bucharest, PO Box MG-11, R-077125 Magurele, Romania
Interests: quantum mechanics; quantum optics; quantum physics; quantum entanglement; quantum information theory; quantum communication

Special Issue Information

Dear Colleagues,

Quantum correlations represent the key ingredient in many applications of quantum technologies, which develop more and more over the last years. Quantum technologies employ the quantum mechanics principles in new phenomena with the help of the information stored in a quantum system. As examples of quantum correlations, we can enumerate: entanglement, quantum discord, quantum steering, quantum coherence. They are widely used in many processes of quantum information processing and quantum optics: quantum teleportation, quantum cryptography, superdense coding, entanglement swapping, quantum computing, quantum algorithms, quantum imaging.

This Special Issue of Entropy entitled “Quantum correlations used in quantum technologies” is dedicated to the investigation and applications of the quantum correlations in quantum technologies, covering a large number of branches in the field of quantum information processing and quantum optics.

Dr. Iulia Ghiu
Guest Editor

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. Entropy 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 2600 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 correlations: entanglement, discord, steering, quantum coherence
  • quantum technologies based on quantum correlations
  • quantum optics
  • quantum algorithms
  • quantum computing
  • quantum circuits
  • quantum noise
  • quantum error correction
  • quantum imaging

Published Papers (2 papers)

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Research

13 pages, 12295 KiB  
Article
Analysis of Quantum Correlations Obtained Using Local Optimal Universal Asymmetric Cloners
by Cătălina Cîrneci and Iulia Ghiu
Entropy 2023, 25(1), 29; https://doi.org/10.3390/e25010029 - 23 Dec 2022
Viewed by 859
Abstract
We apply the local optimal universal asymmetric cloning machine on an initially pure entangled state of two qubits. As output, we obtain two final states which present quantum correlations. We analyze three types of quantum correlations among the final states, namely, concurrence, quantum [...] Read more.
We apply the local optimal universal asymmetric cloning machine on an initially pure entangled state of two qubits. As output, we obtain two final states which present quantum correlations. We analyze three types of quantum correlations among the final states, namely, concurrence, quantum discord, and consonance. A detailed comparison between concurrence, quantum discord, and consonance is made, and we find that consonance is greater than quantum discord, which is in turn greater than concurrence. Full article
(This article belongs to the Special Issue Quantum Correlations Used in Quantum Technologies)
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18 pages, 331 KiB  
Article
Detecting Tripartite Steering via Quantum Entanglement
by Zhihua Chen and Shao-Ming Fei
Entropy 2022, 24(9), 1297; https://doi.org/10.3390/e24091297 - 14 Sep 2022
Cited by 1 | Viewed by 1285
Abstract
Einstein-Podolsky-Rosen steering is a kind of powerful nonlocal quantum resource in quantum information processing such as quantum cryptography and quantum communication. Many criteria have been proposed in the past few years to detect steerability, both analytically and numerically, for bipartite quantum systems. We [...] Read more.
Einstein-Podolsky-Rosen steering is a kind of powerful nonlocal quantum resource in quantum information processing such as quantum cryptography and quantum communication. Many criteria have been proposed in the past few years to detect steerability, both analytically and numerically, for bipartite quantum systems. We propose effective criteria for tripartite steerability and genuine tripartite steerability of three-qubit quantum states by establishing connections between the tripartite steerability (resp. genuine tripartite steerability) and the tripartite entanglement (resp. genuine tripartite entanglement) of certain corresponding quantum states. From these connections, tripartite steerability and genuine tripartite steerability can be detected without using any steering inequalities. The “complex cost” of determining tripartite steering and genuine tripartite steering can be reduced by detecting the entanglement of the newly constructed states in the experiment. Detailed examples are given to illustrate the power of our criteria in detecting the (genuine) tripartite steerability of tripartite states. Full article
(This article belongs to the Special Issue Quantum Correlations Used in Quantum Technologies)
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