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cond-mat.stat-mech2018★ 6 cited
Re-examining the quadratic approximation in theory of a weakly interacting Bose gas with condensate: the role of nonlocal interaction potentials
Mykyta Bulakhov, Alexander Peletminskii, Sergey Peletminskii +2
We derive and analyze the coupled equations of quadratic approximation of the Bogoliubov model for a weakly interacting Bose gas. The first equation determines the condensate densi…
cond-mat.str-el2018★ 6 cited
Suppression and revival of long-range ferromagnetic order in the multiorbital Fermi-Hubbard model
Andrii Sotnikov, Agnieszka Cichy, Jan Kuneš
By means of dynamical mean-field theory allowing for complete account of SU(2) rotational symmetry of interactions between spin-1/2 particles, we observe a strong effect of suppres…