Ramiza Kh. Djumanova

collaborators

2 papers

math.SP2006

Low energy effects for a family of Friedrichs models

Sergio Albeverio, Saidakhmat N. Lakaev, Ramiza Kh. Djumanova

A family of Friedrichs models with rank one perturbations $h_{μ} (p),$ $p \in (- π, π]^{3}, μ > 0$ associated to a system of two particles on the lattice $Z^{3}$ is considered. The existence…

math-ph2005

On the essential and discrete spectrum of a model operator related to three-particle discrete Schrödinger operators

Sergio Albeverio, Saidakhmat N. Lakaev, Ramiza Kh. Djumanova

A model operator $H$ corresponding to a three-particle discrete Schrödinger operator on a lattice $Z^{3}$ is studied. The essential spectrum is described via the spectrum of two Fri…