312 citations · 701 across the 14 of their papers we have counts for
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Magnetization of Planar Four-Fermion Systems
Heron Caldas, Rudnei O. Ramos
We consider a planar system of fermions, at finite temperature and density, under a static magnetic field parallel to the two-dimensional plane. This magnetic field generates a Zee…
Critical Dopant Concentration in Polyacetylene and Phase Diagram from a Continuous Four-Fermi Model
Heron Caldas, Jean-Loic Kneur, Marcus B. Pinto +1
The Optimized Perturbation Theory (OPT) method, at finite temperature and finite chemical potential, is applied to the field theory model for polyacetylene. The critical dopant con…
Asymptotically Improved Convergence of Optimized Perturbation Theory in the Bose-Einstein Condensation Problem
Jean-Loic Kneur, Marcus B. Pinto, Rudnei O. Ramos
We investigate the convergence properties of optimized perturbation theory, or linear expansion (LDE), within the context of finite temperature phase transitions. Our results p…
Unusual Transition Patterns in Bose-Einstein Condensation
Marcus B. Pinto, Rudnei O. Ramos, Frederico F. de Souza Cruz
We analyze the possible transition patterns exhibited by an effective non-relativistic field model describing interacting binary homogeneous dilute Bose gases whose overall potenti…
Microscopic Evolution of a Weakly Interacting Homogeneous Bose Gas
D. G. Barci, E. S. Fraga, Rudnei O. Ramos
We provide a detailed description of the nonequilibrium time evolution of an interacting homogeneous Bose-Einstein condensate. We use a nonperturbative in-medium quantum field theo…