Dense and hot QCD at strong coupling

  • We present a novel framework for the equation of state of dense and hot quantum chromodynamics (QCD), which focuses on the region of the phase diagram relevant for neutron star mergers and core-collapse supernovae. The model combines predictions from the gauge/gravity duality with input from lattice field theory, QCD perturbation theory, chiral effective theory, and statistical modeling. It is therefore, by construction, in good agreement with theoretical constraints both at low and high densities and temperatures. The main ingredients of our setup are the nonperturbative V-QCD model based on the gauge/gravity duality, a van der Waals model for nucleon liquid, and the DD2 version of the Hempel-Schaffner-Bielich statistical model of nuclear matter. By consistently combining these models, we also obtain a description for the nuclear to quark matter phase transition and its critical end point. The parameter dependence of the model is represented by three (soft, intermediate, and stiff) variants of the equation of state, all of which agree with observational constraints from neutron stars and their mergers. We discuss resulting constraints for the equation of state, predictions for neutron stars, and the location of the critical point.

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Author:Tuna DemircikORCiD, Christian EckerORCiD, Matti JärvinenORCiD
URN:urn:nbn:de:hebis:30:3-843901
DOI:https://doi.org/10.1103/PhysRevX.12.041012
ISSN:2160-3308
ArXiv Id:http://arxiv.org/abs/2112.12157
Parent Title (German):Physical review X
Publisher:American Physical Society
Place of publication:College Park, Md.
Document Type:Article
Language:English
Date of Publication (online):2022/10/31
Date of first Publication:2022/10/31
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2024/04/30
Volume:12
Issue:4, 041012
Article Number:041012
Page Number:22
HeBIS-PPN:520346882
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International