2.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR835 papers
- The Ohio State UniversityUS812 papers
- Universidade de São PauloBR798 papers
- Panjab UniversityIN636 papers
- Universidade Federal do ABCBR635 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TorinoIT634 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR603 papers
- Benemérita Universidad Autónoma de PueblaMX594 papers
- European Organization for Nuclear ResearchCH583 papers
- Wayne State UniversityUS576 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT570 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di CataniaIT565 papers
72 papers · 1 filter
Ferromagnetic tunneling junctions at low voltages: elastic versus inelastic scattering at
C. A. Dartora, G. G. Cabrera
In this paper we analyze different contributions to the magnetoresistance of magnetic tunneling junctions at low voltages. A substantial fraction of the resistance drop with voltag…
Coherent states superpositions in cavity quantum electrodynamics with trapped ions
F. L. Semiao, A. Vidiella-Barranco
We investigate how superpositions of motional coherent states naturally arise in the dynamics of a two-level trapped ion coupled to the quantized field inside a cavity. We extend o…
Eikonal representation in the momentum-transfer space
P. A. S. Carvalho, A. F. Martini, M. J. Menon
By means of empirical fits to the differential cross section data on pp and p(bar)p elastic scattering, above 10 GeV (center-of-mass energy), we determine the eikonal in the moment…
Some Remarks on the Coupling Prescription of Teleparallel Gravity
Ricardo A. Mosna, J. G. Pereira
By using a nonholonomic moving frame version of the general covariance principle, an active version of the equivalence principle, an analysis of the gravitational coupling prescrip…
On the origin of the A and B electronic Raman scattering peaks in the superconducting state of YBaCuO
H. Martinho, A. A. Martin, C. Rettori +2
The electronic Raman scattering has been investigated in optimally oxygen doped YBaCuO single crystals as well as in crystals with non-magnetic, Zn, and magneti…
Dissipative dynamics of spins in quantum dots
Harry Westfahl, Amir O. Caldeira, Gilberto Medeiros-Ribeiro +1
We present a theory for the dissipation of electronic spins trapped in quantum dots due to their coupling to the host lattice acoustic phonon modes. Based on the theory of dissipat…
Exact General Relativistic Thick Disks
Guillermo A. Gonzalez, Patricio S. Letelier
A method to construct exact general relativistic thick disks that is a simple generalization of the ``displace, cut and reflect'' method commonly used in Newtonian, as well as, in…
A two band model for Superconductivity: Probing interband pair formation
R. E. Lagos, G. G. Cabrera
We propose a two band model for superconductivity. It turns out that the simplest nontrivial case considers solely interband scattering, and both bands can be modeled as symmetric…
Thermal entanglement in the two-qubit Heisenberg XYZ model
G. Rigolin
We study the entanglement of a two-qubit one dimensional XYZ Heisenberg chain in thermal equilibrium at temperature T. We obtain an analytical expression for the entanglement of fo…
Dynamics of Fixation of Advantageous Mutations
Viviane M. de Oliveira, Paulo R. A. Campos
We investigate the process of fixation of advantageous mutations in an asexual population. We assume that the effect of each beneficial mutation is exponentially distributed with m…
One dimensional gapless magnons in a single anisotropic ferromagnetic nanolayer
A. Villares-Ferrer, P. F. Farinas, A. O. Caldeira
Gapless magnons in a plane ferromagnet with normal axis anisotropy are shown to exist besides the usual gapped modes that affect spin dependent transport properties only above a fi…
Entanglement versus chaos in disordered spin chains
L. F. Santos, G. Rigolin, C. O. Escobar
We use a Heisenberg spin-1/2 chain to investigate how chaos and localization may affect the entanglement of pairs of qubits. To measure how much entangled a pair is, we compute its…
Determination of the calorimetric energy in extensive air showers
Henrique M. J. Barbosa, Fernando Catalani, Jose A. Chinellato +1
The contribution of different components of an air shower to the total energy deposit in the atmosphere, for different angles and primary particles, was studied using the CORSIKA a…
Vortex Lattice in Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} Well Above the First-Order Phase-Transition Boundary
J. H. S. Torres, R. Ricardo da Silva, S. Moehlecke +1
Measurements of non-local in-plane resistance originating from transverse vortex-vortex correlations have been performed on a Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} high-T_c superconductor in…
Search for the Rare Decay KL --> pi0 ee
KTeV collaboration, A. Alavi-Harati
The KTeV/E799 experiment at Fermilab has searched for the rare kaon decay KL--> pi0ee. This mode is expected to have a significant CP violating component. The measurement of its br…
Focused X-shaped (Superluminal) pulses
M. Zamboni Rached, Amr Shaarawi, Erasmo Recami
The space-time focusing of a (continuous) succession of localized X-shaped pulses is obtained by suitably integrating over their speed, i.e., over their axicon angle, thus generali…
Local Ferromagnetism in Microporous Carbon with the Structural Regularity of Zeolite Y
Y. Kopelevich, R. R. da Silva, J. H. S. Torres +2
Magnetization M(H,T) measurements have been performed on microporous carbon (MC) with a three-dimensional nano-array structure corresponding to that of a zeolite Y supercage. The o…
On the Stability of Circular Orbits of Particles Moving around Black Holes Surrounded by Axially Symmetric Structures
Patricio. S. Letelier
The Rayleigh criterion is used to study the stability of circular orbits of particles moving around static black holes surrounded by different axially symmetric structures with ref…
Magnetothermal Conductivity of Highly Oriented Pyrolytic Graphite in the Quantum Limit
R. Ocaña, P. Esquinazi, H. Kempa +2
We report on the magnetic field (0TT) dependence of the longitudinal thermal conductivity of highly oriented pyrolytic graphite in the temperature range 5 K…
AdS Geometry, projective embedded coordinates and associated isometry groups
Roldao da Rocha, E. Capelas de Oliveira
This work is intended to investigate the geometry of anti-de Sitter spacetime (AdS), from the point of view of the Laplacian Comparison Theorem (LCT), and to give another descripti…
Atmospheric neutrinos: LMA oscillations, Ue3 induced interference and CP-violation
O. L. G. Peres, A. Yu. Smirnov
We consider oscillations of the low energy (sub-GeV sample) atmospheric neutrinos in the three neutrino context. We present the semi-analytic study of the neutrino evolution and ca…
Solar neutrinos: the SNO salt phase results and physics of conversion
P. C. de Holanda, A. Yu. Smirnov
We have performed analysis of the solar neutrino data including results from the SNO salt phase as well as the combined analysis of the solar and the KamLAND results. The best fit…
Critical analysis of derivative dispersion relations at high energies
R. F. Avila, M. J. Menon
We discuss some formal and fundamental aspects related with the replacement of integral dispersion relations by derivative forms, and their practical uses in high energy elastic ha…
Field propagation in de Sitter black holes
C. Molina, D. Giugno, E. Abdalla +1
We present an exhaustive analysis of scalar, electromagnetic and gravitational perturbations in the background of Schwarzchild-de Sitter and Reissner-Nordstrom-de Sitter spacetimes…