57 citations · 395 across the 17 of their papers we have counts for
17 papers
All order resummed leading and next-to-leading soft modes of dense QCD pressure
Loïc Fernandez, Jean-Loïc Kneur
The cold and dense QCD equation of state (EoS) at high baryon chemical potential involves at order an all-loop summation of the soft mode cont…
Renormalization group optimized pressure at next-to-next-to-leading order
Loïc Fernandez, Jean-Loïc Kneur
We investigate the renormalization group optimized perturbation theory (RGOPT) at the next-to-next-to-leading order (NNLO) for the thermal scalar field theory. From comparing three…
Quark Condensate from Renormalization Group Optimized Spectral Density
J. -L. Kneur, A. Neveu
Our renormalization group consistent variant of optimized perturbation, RGOPT, is used to calculate the nonperturbative QCD spectral density of the Dirac operator and the related c…
Renormalization Group Optimized Perturbation Theory at Finite Temperatures
J. -L. Kneur, M. B. Pinto
A recently developed variant of the so-called optimized perturbation theory (OPT), making it perturbatively consistent with renormalization group (RG) properties, RGOPT, was shown…
Scale Invariant Resummed Perturbation at Finite Temperatures
J. -L. Kneur, M. B. Pinto
We use the scalar model with quartic interaction to illustrate how a nonperturbative variational technique combined with renormalization group (RG) properties efficiently resums pe…
The chiral condensate from renormalization group optimized perturbation
J. -L. Kneur, A. Neveu
Our recently developed variant of variationnally optimized perturbation (OPT), in particular consistently incorporating renormalization group properties (RGOPT), is adapted to the…
A new determination of from Renormalization Group Optimized Perturbation
J-L. Kneur, A. Neveu
A new version of the so-called optimized perturbation (OPT), implementing consistently renormalization group properties, is used to calculate the nonperturbative ratio $F_π/\overli…
Phase diagram of the magnetized planar Gross-Neveu model beyond the large-N approximation
Jean-Loic Kneur, Marcus Benghi Pinto, Rudnei O. Ramos
The phase diagram and thermodynamic properties of the (2+1)-dimensional Gross-Neveu model are studied in the presence of a constant magnetic field. The optimized perturbation theor…
α_S from and Renormalization Group Optimized Perturbation
J. -L. Kneur, A. Neveu
A variant of variationally optimized perturbation, incorporating renormalization group properties in a straightforward way, uniquely fixes the variational mass interpolation in ter…
Vector-like contributions from Optimized Perturbation in the Abelian Nambu--Jona-Lasinio model for cold and dense quark matter
Jean-Loic Kneur, Marcus Benghi Pinto, Rudnei O. Ramos +1
Two-loop corrections for the standard Abelian Nambu-Jona-Lasinio model are obtained with the Optimized Perturbation Theory (OPT) method. These contributions improve the usual mean-…
Lambda^{QCD}_{MS} from Renormalization Group Optimized Perturbation
J. -L. Kneur, A. Neveu
A recent extension of a variationally optimized perturbation, combined with renormalization group properties in a straightforward way, can provide approximations to nonperturbative…
Renormalization Group Improved Optimized Perturbation Theory: Revisiting the Mass Gap of the O(2N) Gross-Neveu Model
J. -L. Kneur, A. Neveu
We introduce an extension of a variationally optimized perturbation method, by combining it with renormalization group properties in a straightforward (perturbative) form. This lea…
Thermodynamics and Phase Structure of the Two-Flavor Nambu--Jona-Lasinio Model Beyond Large-N_c
Jean-Loic Kneur, Marcus Benghi Pinto, Rudnei O. Ramos
The optimized perturbation theory (OPT) method is applied to the version of the Nambu--Jona-Lasinio (NJL) model both at zero and at finite temperature and/or density. At th…
The 2d Gross-Neveu Model at Finite Temperature and Density with Finite Corrections
Jean-Loic Kneur, Marcus Benghi Pinto, Rudnei O. Ramos
We use the linear expansion, or optimized perturbation theory, to evaluate the effective potential for the two dimensional Gross-Neveu model at finite temperature and density o…
Convergent resummed linear delta expansion in the critical O(N) (ϕ_i^2)^2_{3d} model
Jean-Loic Kneur, Marcus B. Pinto, Rudnei O. Ramos
The nonperturbative linear delta expansion (LDE) method is applied to the critical O(N) phi^4 three-dimensional field theory which has been widely used to study the critical temper…
Dynamical Chiral Symmetry Breaking from Variationally Improved Perturbative Expansion
J. -L. Kneur
We review how a specific resummation of the so-called "delta-expansion", applied to the QCD Lagrangian, transforms the ordinary perturbative expansion in into an expansion in…
Variational Quark Mass Expansion and the Order Parameters of Chiral Symmetry Breaking
J. -L. Kneur
We investigate in some detail a "variational mass" expansion approach, generalized from a similar construction developed in the Gross-Neveu model, to evaluate the basic order param…