2 papers
physics.gen-ph2015
Frequency depending permittivity of the Coulomb system with Bose-Einstein condensate
V. B. Bobrov, S. A. Trigger
The second-order singularity is found in the low-frequency region of the permittivity of a homogeneous and isotropic system of charged particles consisting of electrons and boson n…
cond-mat.stat-mech2012
Elementary excitations and heat capacity singularity in superfluid helium
V. B. Bobrov, S. A. Trigger
We proceed from the premise that the spectrum of elementary excitations in the normal component in Landau's theory of superfluidity should depend on the superfluid helium temperatu…