167 citations · 203 across the 8 of their papers we have counts for
8 papers
Ward Identities and chiral anomalies for coupled fermionic chains
L. C. Costa, A. Ferraz, V. Mastropietro
Coupled fermionic chains are usually described by an effective model written in terms of bonding and anti-bonding spinless fields with linear dispersion in the vicinities of the re…
Ward identities for the Anderson impurity model: derivation via functional methods and the exact renormalization group
Peter Kopietz, Lorenz Bartosch, Lucio Costa +2
Using functional methods and the exact renormalization group we derive Ward identities for the Anderson impurity model. In particular, we present a non-perturbative proof of the Ya…
Ultracold Heteronuclear Fermi-Fermi Molecules
A. -C. Voigt, M. Taglieber, L. Costa +4
We report on the first creation of ultracold bosonic heteronuclear molecules of two fermionic species, 6Li and 40K, by a magnetic field sweep across an interspecies s-wave Feshbach…
Vacuum Polarization Effects in the Lorentz and PCT Violating Electrodynamics
G. Bonneau, L. C. Costa, J. L. Tomazelli
In this work we report new results concerning the question of dynamical mass generation in the Lorentz and PCT violating quantum electrodynamics. A one loop calculation for the vac…
The Role of Mass and External Field on the Fermionic Casimir Effect
J. L. Tomazelli, L. C. Costa
The aim of this work is to investigate the role played by the fermion mass and that of an external field on the fermionic Casimir energy density under S^1 X R^3 topology. Both twis…
The Euler-Kockel-Heisenberg Lagrangian at Finite Temperature
J. L. Tomazelli, L. C. Costa
In the present work we investigate temperature effects on the spinor and scalar effetive QED in the context of Thermo Field Dynamics. Following Weisskopf's zero-point energy method…