Zobrazeno 1 - 10
of 2 232
pro vyhledávání: '"Gros, C."'
Autor:
Gros, C., Kaczor, G.
Publikováno v:
Logic Journal of the IGPL, Vol. 18, 686 (2010)
The human brain is autonomously active, being characterized by a self-sustained neural activity which would be present even in the absence of external sensory stimuli. Here we study the interrelation between the self-sustained activity in autonomousl
Externí odkaz:
http://arxiv.org/abs/0903.1979
Publikováno v:
Phys. Rev. B 79, 024509 (2009)
We investigate the effect of external pressure on the Fe magnetic moment in undoped LaOFeAs within the framework of density functional theory and show that this system is close to a magnetic instability: The Fe moment is found to drop by nearly a fac
Externí odkaz:
http://arxiv.org/abs/0808.0834
Autor:
Gros, C.
Publikováno v:
Springer (2008/2010/2013/2015)
An thorough introduction is given at an introductory level to the field of quantitative complex system science, with special emphasis on emergence in dynamical systems based on network topologies. Subjects treated include graph theory and small-world
Externí odkaz:
http://arxiv.org/abs/0807.4838
Publikováno v:
Advances in Physics, Volume 56, 927 (2007).
We review the Resonating Valence Bond (RVB) theory of high temperatur e superconductivity using Gutzwiller projected wave functions that incorporate strong correlations. After a general overview of the phenomenon of high temperature superconductivity
Externí odkaz:
http://arxiv.org/abs/0707.1020
Publikováno v:
Phys. Rev. B, 72, 144505 (2005)
We generalize the Gutzwiller approximation scheme to the calculation of nontrivial matrix elements between the ground state and excited states. In our scheme, the normalization of the Gutzwiller wave function relative to a partially projected wave fu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0503143
Publikováno v:
Phys. Rev. Lett. 95, 107201 (2005)
Following the recent discussion on the puzzling nature of the interactions in the nanotubular system Na2V3O7, we present a detailed ab-initio microscopic analysis of its electronic and magnetic properties. By means of a non-trivial downfolding study
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410066
Autor:
Chitov, G. Y., Gros, C.
Publikováno v:
J. Phys.: Condens. Matter 16, L415-L420 (2004)
We propose a mechanism for the observed stacking charge order in the quarter-filled ladder compound NaV2O5. Via a standard mapping of the charge degrees of freedom onto Ising spins we explain the stacking order as a result of competition between coup
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407700
Publikováno v:
New J. Phys. 6 (2004) 188
In the situation of two electro-statically coupled conductors a current in one conductor may induce a current in the other one. We will study this phenomenon, called Coulomb drag, in the Hubbard chain where the two ``conductors'' are given by fermion
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407701
Autor:
Chitov, G. Y., Gros, C.
Publikováno v:
Low Temperature Physics 31, 722-734 (2005)
We study the 2D Ising model on a square lattice with additional non-equal diagonal next-nearest neighbor interactions. The cases of classical and quantum (transverse) models are considered. Possible phases and their locations in the space of three Is
Externí odkaz:
http://arxiv.org/abs/cond-mat/0401295
Publikováno v:
Supercond.Sci.Technol. 1 (1988) 36
The effective Hamiltonian of strongly correlated electrons on a square lattice is replaced by a renormalised Hamiltonian and the factors that renormalise the kinetic energy of holes and the Heisenberg spin-spin coupling are calculated using a Gutzwil
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311604