Selected Papers from “The Modern Physics of Compact Stars and Relativistic Gravity 2025”

A special issue of Particles (ISSN 2571-712X). This special issue belongs to the section "Astroparticle Physics and Cosmology".

Deadline for manuscript submissions: closed (31 March 2026) | Viewed by 1156

Special Issue Editors


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Guest Editor
Department of Physics, Yerevan State University, Alex Manoogian Street, Yerevan 0025, Armenia
Interests: quantum effects in external fields; the Casimir effect; string effective gravity and cosmology; alternative theories of gravity
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Guest Editor
1. Frankfurt Institute for Advanced Studies (FIAS), D-60438 Frankfurt am Main, Germany
2. Institute of Theoretical Physics, University of Wroclaw, 50-204 Wroclaw, Poland
Interests: nuclear physics; astrophysics of compact stars; quantum condensates; heavy-ion physics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is our great pleasure to announce that this Special Issue of Particles, an open access journal by MDPI, will publish selected papers based on presentations at The Modern Physics of Compact Stars and Relativistic Gravity 2025 (Sep 23–26, 2025, Yerevan; https://indico.global/event/13917/). Manuscripts submitted for consideration should present original, unpublished research relevant to this topic or offer a review of the authors’ field of expertise. All submissions will undergo peer review by internationally recognized experts.

The Modern Physics of Compact Stars and Relativistic Gravity 2025 is the eighth edition in a series aiming to gather experts in astrophysics, dense matter physics, gravitation, cosmology, pulsar observations, binary neutron stars, and related fields. We hope that this Special Issue will serve as a valuable reference for both beginners and experienced researchers in the field of compact star physics.

Prof. Dr. Aram Saharian
Prof. Dr. Armen Sedrakian
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 250 words) can be sent to the Editorial Office for assessment.

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. Particles is an international peer-reviewed open access quarterly 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 1600 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

  • the equation of state of dense matter in compact stars and heavy ion collisions
  • quark degrees of freedom in compact stars
  • superfluidity in compact stars
  • compact star cooling, glitches, and magnetic fields
  • alternative theories of gravity
  • cosmological models and theories of gravity
  • gravitational waves

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Published Papers (1 paper)

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Research

12 pages, 404 KB  
Article
Emergence of the Geometric Contribution to the Superfluid Density in the Inner Crust of Neutron Stars
by Giorgio Almirante
Particles 2026, 9(1), 22; https://doi.org/10.3390/particles9010022 - 2 Mar 2026
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Abstract
The geometric contribution to superfluid density has been found to be of great importance in the inner crust of neutron stars. In this work we clarify how this contribution arises in the context of a band theory for neutrons. Specifically, we derive the [...] Read more.
The geometric contribution to superfluid density has been found to be of great importance in the inner crust of neutron stars. In this work we clarify how this contribution arises in the context of a band theory for neutrons. Specifically, we derive the dependence of the superfluid density on the magnitude of the pairing gap when the system has many bands cutting the Fermi energy, as is the case for neutrons in the inner crust. Also, in the perturbation theory framework, we find that it is essential to account for corrections to (Bogoliubov) quasi-particle states in order to obtain the geometric contribution. Accounting only for the corrections to (Hartree–Fock) single-particle states leads to the conventional contribution only. Full article
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