Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Gomes, Y. M."'
Publikováno v:
Phys. Rev. D 110, 056048 (2024)
It is known that the Fierz identities predict that the Gross-Neveu and Thirring models should be equivalent when describing systems composed of a single fermionic flavor, $N=1$. Here, we consider the planar version of both models within the framework
Externí odkaz:
http://arxiv.org/abs/2407.03480
Autor:
Gomes, Y. M. P.
Publikováno v:
Eur. Phys. J. C 84, 958 (2024)
This study investigates the intricate relationship between dissipative processes of open quantum systems and the non-Hermitian quantum field theory of relativistic fermionic systems. By examining the influence of dissipative effects on Dirac fermions
Externí odkaz:
http://arxiv.org/abs/2401.03075
Autor:
Gomes, Y. M. P., Neves, M. J.
A model of $N$ 4-component massless fermions in a quartic self-interaction based on ref. \cite{gomes2022} is investigated in the presence of chemical potential and temperature via optimized perturbation theory that accesses finite-N contributions. We
Externí odkaz:
http://arxiv.org/abs/2310.02472
Publikováno v:
Phys. Rev. B 108, 085107 (2023)
We analyze the possible dynamical chiral symmetry breaking patterns taking place within Weyl type of materials. Here, these systems are modeled by the (2+1)-dimensional Gross-Neveu model with a tilt in the Dirac cone. The optimized perturbation theor
Externí odkaz:
http://arxiv.org/abs/2305.09007
Autor:
Gomes, Y. M. P., Neves, M. J.
Publikováno v:
The European Physical Journal Plus, 138, article number : 543 (2023)
In this work, we propose a model with Lorentz symmetry violation which describes the electronic low energy limit of the AA-bilayer graphene (BLG) system. The AA-type bilayer is known to preserve the linear dispersion relation of the graphene layer in
Externí odkaz:
http://arxiv.org/abs/2302.04327
Autor:
Gomes, Y. M. P., Ramos, Rudnei O.
Publikováno v:
Phys. Rev. B 107, 125120 (2023)
The chiral and superconducting gaps are studied in the context of a planar fermion model with four-fermion interactions. The effect of the tilt of the Dirac cone on both gaps is shown and discussed. Our results point to two different behaviors exhibi
Externí odkaz:
http://arxiv.org/abs/2204.08534
Autor:
Gomes, Y. M. P., Neves, M. J.
Publikováno v:
Phys. Rev. D 106, 015013 (2022)
We propose a model of Majorana fermions with quartic self-couplings. These Majorana fermions acquire masses via a type II seesaw mechanism in which the physical eigenstates are identified as a light Majorana fermion and another heavy Majorana fermion
Externí odkaz:
http://arxiv.org/abs/2201.05652
Autor:
Gomes, Y. M. P., Ramos, Rudnei O.
Publikováno v:
Phys. Rev. B 104, 245111 (2021)
We analyze the chiral symmetry breaking in a planar four-fermion model with non-null chemical potential, temperature and including the effect of the tilt of the Dirac cone. The system is modeled with a $(2 + 1)$-dimensional Gross-Neveu-like interacti
Externí odkaz:
http://arxiv.org/abs/2106.09239
Autor:
Gomes, Y. M. P.
Publikováno v:
Phys. Rev. D 104, 015022 (2021)
In this work, we investigate the dynamical breakdown of Lorentz symmetry in 4 dimensions by the condensation of a fermionic field described by a Dirac Lagrangian with a four-fermion interaction. Using the Keldysh formalism we show that the Lorentz sy
Externí odkaz:
http://arxiv.org/abs/2104.12738
Autor:
GOMES, Y. M.
Publikováno v:
Repositório Institucional da UFESUniversidade Federal do Espírito SantoUFES.
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Um dos problemas mais graves relacion
Um dos problemas mais graves relacion
Externí odkaz:
http://repositorio.ufes.br/handle/10/10301
