Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Oliveira, Luiz N."'
Autor:
Ferrari, Ana Luiza, Oliveira, Luiz N.
The equilibrium transport properties of an elementary nanostructured device with side-coupled geometry are computed and related to universal functions. The computation relies on a real-space formulation of the numerical renormalization-group (NRG) pr
Externí odkaz:
http://arxiv.org/abs/2109.12254
We generalize the linear discrete dimensional scaling approach for the repulsive Hubbard model to obtain a nonlinear scaling relation that yields accurate approximations to the ground-state energy in both two and three dimensions, as judged by compar
Externí odkaz:
http://arxiv.org/abs/1904.10529
The Monty Hal problem is an attractive puzzle. It combines simple statement with answers that seem surprising to most audiences. The problem was thoroughly solved over two decades ago. Yet, more recent discussions indicate that the solution is incomp
Externí odkaz:
http://arxiv.org/abs/1808.05150
Autor:
Zawadzki, Krissia, Oliveira, Luiz N.
The single-impurity Anderson model has been the focus of theoretical studies of molecular junctions and the single-electron transistor, a nanostructured device comprising a quantum dot that bridges two otherwise decoupled metallic leads. The low-temp
Externí odkaz:
http://arxiv.org/abs/1803.07112
In a recent publication, we have discussed the effects of boundary conditions in finite quantum systems and their connection with symmetries. Focusing on the one-dimensional Hubbard Hamiltonian under twisted boundary conditions, we have shown that pr
Externí odkaz:
http://arxiv.org/abs/1803.01443
Publikováno v:
Phys. Rev. B, 91, 155143 (2015)
Some well-established examples of itinerant-electron ferromagnetism in one dimension occur in a Mott-insulating phase. We examine the consequences of doping a ferromagnetic insulator and cou- pling magnons to gapless charge fluctuations. Using a boso
Externí odkaz:
http://arxiv.org/abs/1501.04220
Publikováno v:
Phys. Rev. B 80 (2009) 235317 p.1-22 (merged with 0906.4063)
A numerical renormalization-group survey of the zero-bias electrical conductance through a quantum dot embedded in the conduction path of a nanodevice is reported. The results are examined in the light of a recently derived linear mapping between the
Externí odkaz:
http://arxiv.org/abs/0906.4289
Publikováno v:
Phys. Rev. B 78, 205426 (2008)
A density-functional formalism for superconductivity {\em and} magnetism is presented. The resulting relations unify previously derived Kohn-Sham equations for superconductors and for non-collinear magnetism. The formalism, which discriminates Cooper
Externí odkaz:
http://arxiv.org/abs/0804.0562
Publikováno v:
In Journal of Magnetism and Magnetic Materials 2001 226 Part 1:196-198
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