64 citations · 132 across the 7 of their papers we have counts for
14 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,…
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…
Critical dynamics, duality, and the exact dynamic exponent in extreme type II superconductors
Flavio S. Nogueira, Dirk Manske
The critical dynamics of superconductors is studied using renormalization group and duality arguments. We show that in extreme type II superconductors the dynamic critical exponent…
Metal-Insulator Transition in Two- and Three-Dimensional Logarithmic Plasmas
S. Kragset, A. Sudbo, F. S. Nogueira
We consider scaling of the mean square dipole moments in a plasma with logarithmic interactions in a two- and three-dimensional system. In both cases, we establish the existence of…
Phase structure of Abelian Chern-Simons gauge theories
E. Smorgrav, J. Smiseth, A. Sudbo +1
We study the effect of a Chern-Simons (CS) term in the phase structure of two different Abelian gauge theories. For the compact Maxwell-Chern-Simons theory, we obtain that for valu…
Deconfinement mechanism in three dimensions for gauge fields coupled to bosonic matter fields with fundamental charge
Flavio S. Nogueira, Asle Sudbo
We propose a mechanism by which electric charges deconfine in an Abelian Higgs model with matter fields belonging to the fundamental representation of the gauge group. Kosterlitz-T…