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Estimating the Hubbard repulsion sufficient for the onset of nearly-flat-band ferromagnetism
Hubbard repulsion sufficient onset of nearly-flat-band ferromagnetism
2011/3/2
We consider nearly-flat-band Hubbard models of a ferromagnet, that is the models that are weak perturbations of those flat-band Hubbard models whose ground state is ferromagnetic for any nonzero stren...
On stability of rolls near the onset of convection in a layer with stress-free boundaries
stress-free boundaries linear stability
2010/4/2
We consider a classical problem of linear stability of convective rolls in a plane layer with stress-free horizontal boundaries near the onset of convection. The problem has been studied by a number o...
Periodic orbit analysis at the onset of the unstable dimension variability and at the blowout bifurcation
Periodic orbit analysis blowout bifurcation unstable dimension variability
2010/4/7
Many chaotic dynamical systems of physical interest present a strong form of nonhyperbolicity called unstable dimension variability (UDV), for which the chaotic invariant set contains periodic orbits ...
Logarithmically slow onset of synchronization
synchronization relaxation phenomenon logarithmically slow dynamics
2010/4/8
Here we investigate specifically the transient of a synchronizing system, considering synchronization as a relaxation phenomenon. The stepwise establishment of synchronization is studied in the system...