title: Consistent thermodynamic framework for interacting particles by neglecting thermal noise.
abstract: An effective temperature θ, conjugated to a generalized entropy s(q), was introduced recently for a system of interacting particles. Since θ presents values much higher than those of typical room temperatures T≪θ, the thermal noise can be neglected (T/θ≃0) in these systems. Moreover, the consistency of this definition, as well as of a form analogous to the first law of thermodynamics, du=θds(q)+δW, were verified lately by means of a Carnot cycle, whose efficiency was shown to present the usual form, η=1-(θ(2)/θ(1)). Herein we explore further the heat contribution δQ=θds(q) by proposing a way for a heat exchange between two such systems, as well as its associated thermal equilibrium. As a consequence, the zeroth principle is also established. Moreover, we consolidate the first-law proposal by following the usual procedure for obtaining different potentials, i.e., applying Legendre transformations for distinct pairs of independent variables. From these potentials we derive the equation of state, Maxwell relations, and define response functions. All results presented are shown to be consistent with those of standard thermodynamics for T>0.
authors.affiliation: Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, 22290-180 Rio de Janeiro-RJ, Brazil.|National Institute of Science and Technology for Complex Systems, Rua Xavier Sigaud, 150 22290-180 Rio de Janeiro-RJ, Brazil.
authors.forename: Fernando D
authors.initials: FD
authors.lastname: Nobre
authors.affiliation: Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, 22290-180 Rio de Janeiro-RJ, Brazil.|National Institute of Science and Technology for Complex Systems, Rua Xavier Sigaud, 150 22290-180 Rio de Janeiro-RJ, Brazil.
authors.forename: Evaldo M F
authors.initials: EM
authors.lastname: Curado
authors.affiliation: Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão-SE, Brazil.|National Institute of Science and Technology for Complex Systems, Rua Xavier Sigaud, 150 22290-180 Rio de Janeiro-RJ, Brazil.
authors.forename: Andre M C
authors.initials: AM
authors.lastname: Souza
authors.affiliation: Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador-BA, Brazil.|National Institute of Science and Technology for Complex Systems, Rua Xavier Sigaud, 150 22290-180 Rio de Janeiro-RJ, Brazil.
authors.forename: Roberto F S
authors.initials: RF
authors.lastname: Andrade