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Critical and Tricritical Points for the Massless 2d Gross-Neveu Model Beyond Large N
Jean-Loic Kneur, Marcus Benghi Pinto, Rudnei O. Ramos
Using optimized perturbation theory, we evaluate the effective potential for the massless two dimensional Gross-Neveu model at finite temperature and density containing corrections…
Symmetry Aspects in Nonrelativistic Multi-Scalar Field Models and Application to a Coupled Two-Species Dilute Bose Gas
Rudnei O Ramos, Marcus B Pinto
We discuss unusual aspects of symmetry that can happen due to entropic effects in the context of multi-scalar field theories at finite temperature. We present their consequences, i…
Effective Potential and Thermodynamics for a Coupled Two-Field Bose Gas Model
Marcus Benghi Pinto, Rudnei O. Ramos, Frederico F. de Souza Cruz
We study the thermodynamics of a two-species homogeneous and dilute Bose gas that is self-interacting and quadratically coupled to each other. We make use of field theoretical func…
Inverse Symmetry Breaking in Multi-Scalar Field Theories
Marcus Benghi Pinto, Rudnei O. Ramos
We review how the phenomena of inverse symmetry breaking (and symmetry nonrestoration) may arise in the context of relativistic as well as nonrelativistic multi-scalar field theori…