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7 papers · 1 filter
Time-dependent Gutzwiller theory of magnetic excitations in the Hubbard model
G. Seibold, F. Becca, P. Rubin +1
We use a spin-rotational invariant Gutzwiller energy functional to compute random-phase-approximation-like (RPA) fluctuations on top of the Gutzwiller approximation (GA). The metho…
A Cosmological Model of Holographic Brane Gravity
P. Kuusk, M. Saal
A cosmological scenario with two branes (A and B) moving in a 5-dimensional bulk is considered. As in the case of ecpyrotic and born-again braneworld models it is possible that the…
Localized wave solutions of the scalar homogeneous wave equation and their optical implementation
Kaido Reivelt, Peeter Saari
In recent years the topic of localized wave solutions of the homogeneous scalar wave equation, i.e., the wave fields that propagate without any appreciable spread or drop in intens…
Resonance peak in underdoped cuprates
A. Sherman, M. Schreiber
The magnetic susceptibility measured in neutron scattering experiments in underdoped YBaCuO is interpreted based on the self-consistent solution of the t-J model of…
Spin fluctuations influence on quasiparticle spectrum of realistic p-d model
Maxim M. Korshunov, Sergei G. Ovchinnikov, Alexei V. Sherman
In the present work the multiband p-d model for -layer is treated. It was shown that for the realistic set of parameters besides Zhang-Rice two-particle singlet there is non…
Two-dimensional t-J model at moderate doping
A. Sherman, M. Schreiber
Using the method which retains the rotation symmetry of spin components in the paramagnetic state and has no preset magnetic ordering, spectral and magnetic properties of the two-d…