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cond-mat.quant-gas2026
Phase-space origin of superfluid stability in ring Bose-Einstein condensates
M. O. C. Pires
We present a kinetic description of superfluid currents in ring-shaped Bose-Einstein condensates based on the Wigner phase-space formalism. Starting from the Gross-Pitaevskii equat…
cond-mat.quant-gas2014
Comparison between the numerical solutions and the Thomas-Fermi approximation for atomic-molecular Bose-Einstein condensates
Leonardo S. F. Santos, Marcelo O. C. Pires, Davi Giugno
We study the stationary solution of an atomic Bose-Einstein condensate coupled coherently to a molecular condensate with both repulsive and attractive interspecies interactions con…
cond-mat.quant-gas2012
Generalized Wick's theorem at finite temperature for a quadratic Hamiltonian
M. O. C. Pires
In Gaudin (1960), Michel Gaudin showed the Wick's theorem at finite temperature using a diagonal Hamiltonian. We extend the Gaudin's prove for a statistical density operator which…