Inhomogeneous condensation in the Gross-Neveu model in noninteger spatial dimensions 1 ≤ d < 3. II. Nonzero temperature and chemical potential
- We continue previous investigations of the (inhomogeneous) phase structure of the Gross-Neveu model in a noninteger number of spatial dimensions (1≤d<3) in the limit of an infinite number of fermion species (N→∞) at (non)zero chemical potential μ. In this work, we extend the analysis from zero to nonzero temperature T. The phase diagram of the Gross-Neveu model in 1≤d<3 spatial dimensions is well known under the assumption of spatially homogeneous condensation with both a symmetry broken and a symmetric phase present for all spatial dimensions. In d=1 one additionally finds an inhomogeneous phase, where the order parameter, the condensate, is varying in space. Similarly, phases of spatially varying condensates are also found in the Gross-Neveu model in d=2 and d=3, as long as the theory is not fully renormalized, i.e., in the presence of a regulator. For d=2, one observes that the inhomogeneous phase vanishes, when the regulator is properly removed (which is not possible for d=3 without introducing additional parameters). In the present work, we use the stability analysis of the symmetric phase to study the presence (for 1≤d<2) and absence (for 2≤d<3) of these inhomogeneous phases and the related moat regimes in the fully renormalized Gross-Neveu model in the μ,T-plane. We also discuss the relation between "the number of spatial dimensions" and "studying the model with a finite regulator" as well as the possible consequences for the limit d→3.
Author: | Adrian KoenigsteinORCiDGND, Laurin PannulloORCiDGND |
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URN: | urn:nbn:de:hebis:30:3-793900 |
URL: | https://arxiv.org/abs/2312.04904v1 |
DOI: | https://doi.org/10.48550/arXiv.2312.04904 |
ArXiv Id: | http://arxiv.org/abs/2312.04904v1 |
Parent Title (German): | arxiv |
Publisher: | arxiv |
Document Type: | Preprint |
Language: | English |
Date of Publication (online): | 2023/12/08 |
Date of first Publication: | 2023/12/08 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2024/02/22 |
Issue: | 2312.04904 Version 1 |
Edition: | Version 1 |
Page Number: | 33 |
HeBIS-PPN: | 516154494 |
Institutes: | Physik |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - CC BY - Namensnennung 4.0 International |