14 citations · 58 across the 7 of their papers we have counts for
7 papers
The Tachyon Propagator
D. G. Barci, C. G. Bollini, M. C. Rocca
Following the canonical quantization procedure for a tachyon field, the usual Hamiltonian and the creation and annihilation operators are obtained. The observation that the mass hy…
Reply to comment on ``Competing Interactions, the Renormalization Group and the Isotropic-Nematic Phase Transition''
Daniel G. Barci, Daniel A. Stariolo
The focus of our work is to identify conditions for the presence of an isotropic-nematic phase transition in the context of a generic system with isotropic competing interactions.…
The point-splitting regularization of (2+1)d parity breaking models
D. G. Barci, J. F. Medeiros Neto, L. E. Oxman +1
The coefficient of the Chern-Simons term in the effective action for massive Dirac fermions in three dimensions is computed by using the point-splitting regularization method. We s…
Universal Transverse Conductance between Quantum Hall Regions and (2+1)D Bosonization
Daniel G. Barci, L. E. Oxman
Using bosonization techniques for (2+1)D systems, we show that the transverse conductance for a system with general current interactions, when measured between perfect Hall regions…
A Nonequilibrium Quantum Field Theory Description of the Bose-Einstein Condensate
Daniel G. Barci, E. S. Fraga, Rudnei O. Ramos
We study the detailed out of equilibrium time evolution of a homogeneous Bose-Einstein condensate.We consider a nonrelativistic quantum theory for a self-interacting complex scalar…
On the Electromagnetic Response of Charged Bosons Coupled to a Chern-Simons Gauge Field: A Path Integral Approach
D. G. Barci, E. V. Correa Silva, J. F. Medeiros Neto
We analyze the electromagnetic response of a system of charged bosons coupled to a Chern-Simons gauge field. Path integral techniques are used to obtain an effective action for the…