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Thermodynamics and Superconducting Devices

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

Deadline for manuscript submissions: closed (15 September 2021) | Viewed by 4104

Special Issue Editors


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Guest Editor
Dipartimento di Fisica e Chimica - Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, Italy
Interests: quantum optics; quantum Zeno effect and Zeno dynamics; open quantum systems (decoherence, dissipation, non-Hermitian Hamiltonians); time-dependent Hamiltonians and coherent control; quantum thermodynamics

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Guest Editor
Dipartimento di Fisica e Chimica - Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, Italy
Interests: quantum optics; quantum thermodynamics; josephson junctions; open quantum systems

Special Issue Information

Recently, a great amount of interest has been focused on the study of devices made of superconducting elements, both from a fundamental and applicative point of view, in connection with thermodynamics. Indeed, superconducting devices at a quantum level have a plethora of applications, such as, for example, the realization and exploitation of Bose-Einstein condensates to observe quantum coherence and interference at a mesoscopic level. Another possible application is the implementation of artificial atoms, i.e., quantum systems with a structure of energy levels designed at will, which has brought forth the raise of the circuit quantum electrodynamics. Combined structures of superconductors and insulators allow for realizing Josephson junctions, which have been suggested as a possible way to realize caloritronic-based devices, where heat flows take the place of electric currents.

Since an interaction with the environment is always present, thermodynamical effects deserve to be addressed in this physical scenario. Moreover, thermal machines have been proposed which exploit Josephson junctions and artificial atoms realized with superconductors. Thus a deep understanding of thermodynamic aspects of such structures is timely and of upmost importance.

This special issue aims at collecting new results in the field of thermodynamics in the context of superconducting systems, both theoretical and experimental.

Dr. Benedetto Daniele Militello
Prof. Dr. Anna Napoli
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. 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 thermodynamics
  • superconducting devices
  • artificial atoms
  • circuit QED
  • caloritronics

Published Papers (2 papers)

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Research

11 pages, 1508 KiB  
Article
Synchronizing Two Superconducting Qubits through a Dissipating Resonator
by Benedetto Militello and Anna Napoli
Entropy 2021, 23(8), 998; https://doi.org/10.3390/e23080998 - 31 Jul 2021
Cited by 1 | Viewed by 1686
Abstract
A system consisting of two qubits and a resonator is considered in the presence of different sources of noise, bringing to light the possibility of making the two qubits evolve in a synchronized way. A direct qubit–qubit interaction turns out to be a [...] Read more.
A system consisting of two qubits and a resonator is considered in the presence of different sources of noise, bringing to light the possibility of making the two qubits evolve in a synchronized way. A direct qubit–qubit interaction turns out to be a crucial ingredient, as well as the dissipation processes involving the resonator. The detrimental role of the local dephasing of the qubits is also taken into account. Full article
(This article belongs to the Special Issue Thermodynamics and Superconducting Devices)
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8 pages, 10751 KiB  
Article
Josephson Currents and Gap Enhancement in Graph Arrays of Superconductive Islands
by Massimiliano Lucci, Davide Cassi, Vittorio Merlo, Roberto Russo, Gaetano Salina and Matteo Cirillo
Entropy 2021, 23(7), 811; https://doi.org/10.3390/e23070811 - 25 Jun 2021
Cited by 4 | Viewed by 1723
Abstract
Evidence is reported that topological effects in graph-shaped arrays of superconducting islands can condition superconducting energy gap and transition temperature. The carriers giving rise to the new phase are couples of electrons (Cooper pairs) which, in the superconducting state, behave as predicted for [...] Read more.
Evidence is reported that topological effects in graph-shaped arrays of superconducting islands can condition superconducting energy gap and transition temperature. The carriers giving rise to the new phase are couples of electrons (Cooper pairs) which, in the superconducting state, behave as predicted for bosons in our structures. The presented results have been obtained both on star and double comb-shaped arrays and the coupling between the islands is provided by Josephson junctions whose potential can be tuned by external magnetic field or temperature. Our peculiar technique for probing distribution on the islands is such that the hopping of bosons between the different islands occurs because their thermal energy is of the same order of the Josephson coupling energy between the islands. Both for star and double comb graph topologies the results are in qualitative and quantitative agreement with theoretical predictions. Full article
(This article belongs to the Special Issue Thermodynamics and Superconducting Devices)
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