852 citations
- Centre National de la Recherche ScientifiqueFR21 papers
- Institute of PhysicsPL16 papers
- Jagiellonian UniversityPL15 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR12 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR11 papers
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23 papers · 1 filter
Three-dimensional Lorentzian homogeneous Ricci solitons
M. Brozos-Vazquez, G. Calvaruso, E. Garcia-Rio +1
We describe three-dimensional Lorentzian homogeneous Ricci solitons, showing that all types (i.e. shrinking, expanding and steady) exist. Moreover, all non-trivial examples have no…
Study of diamagnetic fluctuations in YBa_2Cu_3O_{7-x} and Bi_2Sr_2CaCu_2O_{8+x}: Possible observation of phase correlations persisting above T_c
S. Salem-Sugui, J. Mosqueira, A. D. Alvarenga
We report on isofield curves of vs. T, where M is the reversible magnetization, of YBa_2Cu_3O_{6.95}, YBa_2Cu_3O_{6.65}, and Bi_2Sr_2CaCu_2O_{8+x} with the magnetic fie…
Origin of the anomalous Slater-Pauling curve in cobalt-manganese alloy clusters
M. Pereiro, D. Baldomir, J. E. Arias
Surprising enhancement of the magnetic moments recently observed in dilute Co-Mn alloy clusters is explained using ab initio electronic structure calculations. The calculated magne…
Symplectic matrices with predetermined left eigenvalues
E. Macías-Virgós, M. J. Pereira-Sáez
We prove that given four arbitrary quaternion numbers of norm 1 there always exists a symplectic matrix for which those numbers are left eigenvalues. The proof is const…
Q-PYTHIA: a medium-modified implementation of final state radiation
N. Armesto, L. Cunqueiro, C. A. Salgado
We present a Monte Carlo implementation, within PYTHIA, of medium-induced gluon radiation in the final state branching process. Medium effects are introduced through an additive te…
Trace map, Cayley transform and LS category of Lie groups
A. Gómez-Tato, E. Macías-Virgós, M. J. Pereira-Sáez
The aim of this paper is to use the so-called Cayley transform to compute the LS category of Lie groups and homogeneous spaces by giving explicit categorical open coverings. When a…