Special Issue "Gravitomagnetism and Quantum Mechanics"

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

Deadline for manuscript submissions: 28 February 2021.

Special Issue Editors

Prof. Dr. Angelo Tartaglia
Website
Guest Editor
1: Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, 10129 Torino, Italy
2: OATO, Istituto Nazionale di Astrofisica, 00136 Roma, Italy
Interests: gravity; cosmology; gravitomagnetism; space physics; complex systems
Dr. Matteo Luca Ruggiero
Website
Guest Editor
Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
Interests: rotation effects in relativity; gravitomagnetic effects in general relativity; rotating observers in special relativity; gravitational theories with torsion (Einstein–Cartan theory); relativistic theories of gravity and experimental tests; gravitational waves; relativistic positioning systems
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Special Issue Information

Dear Colleagues,

Gravitomagnetism is an ultra-weak effect of general relativity. Its direct detection is comparatively recent and based on analysis of the orbits of satellites around Earth. Indirect evidence may be found in the dynamics of the double pulsar system and other analogous systems. Other experiments exploiting ring lasers have been envisaged or are being implemented. It is worth seeing where we are on the side of experimental characterization of these effects. At the same time, there are e number of questions which should be posed and discussed. Is there a link between gravitomagnetic effects and dark matter in our galaxy and in the visible universe? What role has gravitomagnetism played during the early phases of the evolution of the universe?

The most puzzling question is, however, has gravitomagnetism anything to do with quantum mechanics? On the experimental side, it is interesting to investigate the role that could be played by macroscopic atomic systems. An example is the use of atomic or particle beams, occasionally envisaged in the past in Sagnac-like experiments. A fascinating opportunity could be the use of quantum fluids, such as helium liquids, or superconducting devices. On the conceptual side, we know that quantum mechanics is fully compatible with special relativity and conflicting with general relativity. What about gravitomagnetism? Its relevance may be fully negligible because of the smallness of the effects; however, the relevant aspect is what gravitomagnetism, when it is not a simple coordinate effect, has to do with space–time symmetries. Would this have a subtle influence on atomic systems? Formally exiting the domain of gravitomagnetism, we find another interesting possibility, fully compatible with general relativity and connected with symmetries: this is torsion.

As we can see, there are plenty of good reasons to discuss gravitomagnetism and quantum mechanics.

Prof. Angelo Tartaglia
Dr. Matteo Luca Ruggiero
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 papers will be 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 1800 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

  • gravitomagnetism
  • Lense–Thirring drag
  • ring lasers
  • dark matter
  • quantum fluids
  • space–time symmetries
  • torsion

Published Papers (2 papers)

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Research

Open AccessArticle
Possible Alterations of Local Gravitational Field Inside a Superconductor
Entropy 2021, 23(2), 193; https://doi.org/10.3390/e23020193 - 05 Feb 2021
Abstract
We calculate the possible interaction between a superconductor and the static Earth’s gravitational fields, making use of the gravito-Maxwell formalism combined with the time-dependent Ginzburg–Landau theory. We try to estimate which are the most favorable conditions to enhance the effect, optimizing the superconductor [...] Read more.
We calculate the possible interaction between a superconductor and the static Earth’s gravitational fields, making use of the gravito-Maxwell formalism combined with the time-dependent Ginzburg–Landau theory. We try to estimate which are the most favorable conditions to enhance the effect, optimizing the superconductor parameters characterizing the chosen sample. We also give a qualitative comparison of the behavior of high–Tc and classical low–Tc superconductors with respect to the gravity/superfluid interplay. Full article
(This article belongs to the Special Issue Gravitomagnetism and Quantum Mechanics)
Open AccessArticle
Some Classical and Quantum Aspects of Gravitoelectromagnetism
Entropy 2020, 22(10), 1089; https://doi.org/10.3390/e22101089 - 27 Sep 2020
Abstract
It has been shown that, even in linear gravitation, the curvature of space-time can induce ground state degeneracy in quantum systems, break the continuum symmetry of the vacuum and give rise to condensation in a system of identical particles. Condensation takes the form [...] Read more.
It has been shown that, even in linear gravitation, the curvature of space-time can induce ground state degeneracy in quantum systems, break the continuum symmetry of the vacuum and give rise to condensation in a system of identical particles. Condensation takes the form of a temperature-dependent correlation over distances, of momenta oscillations about an average momentum, of vortical structures and of a positive gravitational susceptibility. In the interaction with quantum matter and below a certain range, gravity is carried by an antisymmetric, second order tensor that satisfies Maxwell-type equations. Some classical and quantum aspects of this type of “gravitoelectromagnetism” were investigated. Gravitational analogues of the laws of Curie and Bloch were found for a one-dimensional model. A critical temperature for a change in phase from unbound to isolated vortices can be calculated using an XY-model. Full article
(This article belongs to the Special Issue Gravitomagnetism and Quantum Mechanics)
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