Zobrazeno 1 - 10
of 321
pro vyhledávání: '"Grandi, N"'
Publikováno v:
Phys. Rev. D 98, 104023 (2018)
In this paper, we consider a family of $n$-dimensional, higher-curvature theories of gravity whose action is given by a series of dimensionally extended conformal invariants. The latter correspond to higher-order generalizations of the Branson $Q$-cu
Externí odkaz:
http://arxiv.org/abs/1805.12160
Publikováno v:
J. High Energ. Phys. (2017) 2017: 87
We investigate the spectral function of fermions in a $p$-wave superconducting state, at finite both temperature and gravitational coupling, using the $AdS/CFT$ correspondence and extending previous research. We found that, for any coupling below a c
Externí odkaz:
http://arxiv.org/abs/1610.04268
Publikováno v:
Phys. Rev. B 88, 045126 (2013)
Based on a detailed symmetry analysis, we state the general rules to build up the effective low energy field theory describing a system of electrons weakly interacting with the lattice degrees of freedom. The basic elements in our construction are wh
Externí odkaz:
http://arxiv.org/abs/1303.3442
Publikováno v:
The European Physical Journal B, Volume 86, Issue 3, 2013
We present a new method to detect Fermi surface instabilities for interacting systems at finite temperature. We first apply it to a list of cases studied previously, recovering already known results in a very economic way, and obtaining most of the i
Externí odkaz:
http://arxiv.org/abs/1207.1539
Publikováno v:
Modern Physics Letters B Vol. 26, No. 19 (2012) 1250125 (9 pages)
We study the effects of spin-antisymmetric interactions on the stability of a Landau-Fermi liquid on the square lattice, using the generalized Pomeranchuk method for two-dimensional lattice systems. In particular, we analyze interactions that could i
Externí odkaz:
http://arxiv.org/abs/1108.0281
Publikováno v:
International Journal of Modern Physics B 25, 3539 (2011)
In the present paper we extend the method to detect Pomeranchuk instabilities in lattice systems developed in previous works to study more general situations. The main result presented here is the extension of the method to include finite temperature
Externí odkaz:
http://arxiv.org/abs/1008.4155
Publikováno v:
Gen.Rel.Grav.42:2663-2701,2010
We study a scalar field theory with a non-standard kinetic term minimally coupled to gravity. We establish the existence of compact boson stars, that is, static solutions with compact support of the full system with self-gravitation taken into accoun
Externí odkaz:
http://arxiv.org/abs/0908.0218
Publikováno v:
Phys. Rev. B 80, 075108 (2009)
We study the presence of Pomeranchuk instabilities induced by interactions on a Fermi liquid description of a graphene layer. Using a recently developed generalization of Pomeranchuk method we present a phase diagram in the space of fillings versus o
Externí odkaz:
http://arxiv.org/abs/0812.4406
Publikováno v:
J.Phys.A41:375401,2008
Recently we proposed that K fields, that is, fields with a non-standard kinetic term, may provide a mechanism for the generation of thick branes, based on the following observations. Firstly, K field theories allow for soliton solutions with compact
Externí odkaz:
http://arxiv.org/abs/0805.3278
Publikováno v:
Phys. Rev. B 78, 115104 (2008) (8 pages)
We develop a procedure for detecting Fermi liquid instabilities by extending the analysis of Pomeranchuk to two-dimensional lattice systems. The method is very general and straightforward to apply, thus providing a powerful tool for the search of exo
Externí odkaz:
http://arxiv.org/abs/0804.4422