136 citations · 533 across the 18 of their papers we have counts for
18 papers
Anomalous positron excess from Lorentz-violating QED
Alexander A. Andrianov, Domenec Espriu, Paola Giacconi +1
We entertain the idea that a suitable background of cold (very low momentum) pseudoscalar particles or condensate, may trigger a background that effectively generates Lorentz-invar…
On the mystery of the missing pie in graphene
Paola Giacconi, Roberto Soldati
We investigate in some detail the structure of the electromagnetic current density for the pseudo-relativistic massless spinor effective model for graphene. It is shown that the ps…
Bare and Induced Lorentz and CPT Invariance Violations in QED
J. Alfaro, A. A. Andrianov, M. Cambiaso +2
We consider QED in a constant axial vector background (Æther). Further Lorentz invariance violations (LIV) might occur owing to radiative corrections. The phenomenology of this mod…
Planar QED at finite temperature and density: Hall conductivity, Berry's phases and minimal conductivity of graphene
C. G. Beneventano, Paola Giacconi, E. M. Santangelo +1
We study 1-loop effects for massless Dirac fields in two spatial dimensions, coupled to homogeneous electromagnetic backgrounds, both at zero and at finite temperature and density.…
Symmetries and the cosmological constant puzzle
A. A. Andrianov, F. Cannata, P. Giacconi +2
We outline the evaluation of the cosmological constant in the framework of the standard field-theoretical treatment of vacuum energy and discuss the relation between the vacuum ene…
The quantum Hall effect in graphene samples and the relativistic Dirac effective action
C. G. Beneventano, Paola Giacconi, E. M. Santangelo +1
We study the Euclidean effective action per unit area and the charge density for a Dirac field in a two--dimensional spatial region, in the presence of a uniform magnetic field per…