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. P., Helayel-Neto, J. A.
Publikováno v:
Eur. Phys. J. C 80, 287 (2020)
In this work we analyse a non-minimal Lorentz-violating extension of the electroweak theory in the fermionic sector. Firstly we analyse the relation between the CKM rotation in the quark sector and possible contributions of this new coupling to flavo
Externí odkaz:
http://arxiv.org/abs/1911.03692