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U-J synergy effect for high-T c superconductors
(American Physical Society, 2005-12)
Using the renormalization group with included self-energy effects and exact diagonalization of small clusters we investigate the ground-state phase diagram of a two-dimensional extended Hubbard model with nearest-neighbor ...
Causal relativistic hydrodynamics of conformal Fermi-Dirac gases
(American Physical Society, 2017-04)
In this paper we address the derivation of causal relativistic hydrodynamics, formulated within the framework of divergence type theories (DTTs), from kinetic theory for spinless particles obeying Fermi-Dirac statistics. ...
Correlation functions in the non-commutative Wess-Zumino-Witten model
(Elsevier Science, 2001-06)
We develop a systematic perturbative expansion and compute the one-loop two-points, three-points and four-points correlation functions in a non-commutative version of the U (N) Wess-Zumino-Witten model in different regimes ...
Holographic Ward identities for symmetry breaking in two dimensions
(Springer, 2017-04)
We investigate symmetry breaking in two-dimensional field theories which have a holographic gravity dual. Being at large N, the Coleman theorem does not hold and Goldstone bosons are expected. We consider the minimal setup ...
The g-theorem and quantum information theory
(Springer, 2016-10)
We study boundary renormalization group flows between boundary conformal field theories in 1 + 1 dimensions using methods of quantum information theory. We define an entropic g-function for theories with impurities in terms ...
Weyl geometry, anti-de Sitter space, and Φ4-theory
(Springer Heidelberg, 2016-05)
We study the Gaussian approximation to the quantum fluctuations of the metric of the fourdimensional anti-de Sitter spacetime. The associated massless scalar field has a quartic self-interaction, for which we construct the ...
Effective action for QED4 through ζ function regularization
(American Institute of Physics, 2001-08)
We obtain, through ζ function methods, the one-loop effective action for massive Dirac fields in the presence of a uniform, but otherwise general, electromagnetic background. After discussing renormalization, we compare ...
Nonequilibrium self-energies, Ng approach, and heat current of a nanodevice for small bias voltage and temperature
(American Physical Society, 2014-03)
Using nonequilibrium renormalized perturbation theory to second order in the renormalized Coulomb repulsion, we calculate the lesser Σ< and and greater Σ> self-energies of the impurity Anderson model, which describes the ...
Extended Hubbard model: Charge ordering and Wigner-Mott transition
(American Physical Society, 2010-10)
Strong correlations effects, which are often associated to the approach to a Mott insulating state, in some cases may be observed even far from half filling. This typically happens whenever the intersite Coulomb repulsion ...
Influence of Rashba spin-orbit coupling on the 0-π transition and Kondo temperature in one-dimensional superconductors
(American Physical Society, 2019-12)
Using the framework of the density-matrix renormalization group (DMRG), we study a quantum dot coupled to a superconducting nanowire with strong Rashba spin-orbit coupling. Regarding the singlet-to-doublet "0-π" transition ...