26 citations · 85 across the 7 of their papers we have counts for
7 papers
Double-peak specific heat anomaly and correlations in the Bose-Hubbard model
Eduardo O. Rizzatti, Marco Aurélio A. Barbosa, Marcia C. Barbosa
Considering the thermodynamics of bosons in a lattice described by the Bose-Hubbard Hamiltonian, we report the occurrence of anomalous double peaks in their specific heat dependenc…
Quantum density anomaly in optically trapped ultracold gases
Eduardo O. Rizzatti, Marco Aurelio A. Barbosa, Marcia C. Barbosa
We show that the Bose-Hubbard Model exhibits an increase in density with temperature at fixed pressure in the regular fluid regime and in the superfluid phase. The anomaly at the B…
Residual entropy and waterlike anomalies in the repulsive one dimensional lattice gas
Fernando Barbosa V. da Silva, Fernando Albuquerque Oliveira, Marco Aurélio A. Barbosa
The thermodynamic and kinetics of the one dimensional lattice gas with repulsive interaction is investigated using transfer matrix technique and Monte Carlo simulations. This simpl…
Multiple liquid-liquid critical points and anomalies in core-softened potentials
Marco Aurélio A. Barbosa, Evy Salcedo, Marcia Barbosa
The relation between liquid-liquid phase transitions and waterlike density anomalies in core-softened potentials of fluids was investigated in an exactly solvable one dimensional l…
Thermodynamic and dynamic anomalies in a one dimensional lattice model of liquid water
Marco Aurélio A. Barbosa, Fernando Vito Barbosa, Fernando Albuquerque de Oliveira
We investigate the occurrence of waterlike thermodynamic and dynamic anomalous behavior in a one dimensional lattice gas model. The system thermodynamics is obtained using the tran…
Molecular correlations and solvation in simple fluids
Marco A. A. Barbosa, B. Widom
We study the molecular correlations in a lattice model of a solution of a low-solubility solute, with emphasis on how the thermodynamics is reflected in the correlation functions.…
Solution of an associating lattice gas model with density anomaly on a Husimi lattice
T. J. Oliveira, J. F. Stilck, M. A. A. Barbosa
We study a model of a lattice gas with orientational degrees of freedom which resemble the formation of hydrogen bonds between the molecules. In this model, which is the simplified…