34 citations · 96 across the 5 of their papers we have counts for
5 papers
Thermally induced rotons in two-dimensional dilute Bose gases
Flavio S. Nogueira, Hagen Kleinert
We show that roton-like excitations are thermally induced in a two-dimensional dilute Bose gas as a consequence of the strong phase fluctuations in two dimensions. At low momentum,…
Geometric model of dark energy
V. Folomeev, V. Gurovich, H. Kleinert
A cosmological model with a gravitational Lagrangian is set up to account for the presently observed re-acceleration of the universe. The evolution equation…
Quantum electrodynamics in 2+1 dimensions, confinement, and the stability of U(1) spin liquids
Flavio S. Nogueira, Hagen Kleinert
Compact quantum electrodynamics in 2+1 dimensions often arises as an effective theory for a Mott insulator, with the Dirac fermions representing the low-energy spinons. An importan…
Path Integral Approach to 't Hooft's Derivation of Quantum from Classical Physics
Massimo Blasone, Petr Jizba, Hagen Kleinert
We present a path-integral formulation of 't Hooft's derivation of quantum from classical physics. The crucial ingredient of this formulation is Gozzi et al.'s supersymmetric path…
Highly Accurate Critical Exponents from Self-Similar Variational Perturbation Theory
H. Kleinert, V. I. Yukalov
We extend field theoretic variational perturbation theory by self-similar approximation theory, which greatly accelerates convergence. This is illustrated by re-calculating the cri…