8 papers
Supersolid and the non-uniform condensate
N. Kumar
We construct a model of non-uniform condensate having a spatially modulated complex order parameter that makes it kinematically an x-ray solid, i.e., a real mass density wave, but…
Decohering quantum statistics: Suppression of BEC
N. Kumar
It is argued that the environment induced decoherence between spatially separated parts of the wavefunction for an open quantum system also classicalizes the quantum statistics whi…
Vogel-Fulcher law of glass viscosity: A new approach
N. Kumar
Starting with an expression, due originally to Einstein, for the shear viscosity \textit{}(\textit{}) of a liquid having a small fraction \textit{}by volume of solid par…
Distribution of the delay time and the dwell time for wave reflection from a long random potential
S. Anantha Ramakrishna, N. Kumar
We re-examine and correct an earlier derivation of the distribution of the Wigner phase delay time for wave reflection from a long one-dimensional disordered conductor treated in t…
Cut-off free finite zero-point vacuum energy and the cosmological missing mass problem
N. Kumar
As the mass-energy is universally self-gravitating, the gravitational binding energy must be subtracted self-consistently from its bare mass value so as to give the physical gravit…
Blocking of inter-subspace tunneling by intra subspace inelastic scattering
T. P. Pareek, A. M. Jayannavar, N. Kumar
In recent years the notion of intrinsic decoherence and dephasing of a particle interacting with its environment is being investigated intensively. This has an important bearing on…