Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- L. Sánchez‐Soto128 · h 37
- M. Martin-Delgado126 · h 47
- F. Llanes-Estrada122 · h 28
- P. Pérez-González2 profiles120 · h 71
- V. Martín-Mayor112 · h 41
- J. Caballero3 profiles103 · h 36
- D. Montes2 profiles100 · h 47
- A. Dobado96 · h 32
- A. L. Maroto79 · h 32
- F. Domínguez‐Adame79 · h 28
- J. Gallego73 · h 30
- L. A. Fernández70 · h 28
- Instituto de Astrofísica de CanariasES749 papers
- Centre National de la Recherche ScientifiqueFR727 papers
- Consejo Superior de Investigaciones CientíficasES669 papers
- Universidad de La LagunaES660 papers
- Universidad Autónoma de MadridES549 papers
- Instituto de Astrofísica de AndalucíaES514 papers
- National Institute for AstrophysicsIT368 papers
- Centro de AstrobiologíaES366 papers
- Universidad Carlos III de MadridES354 papers
- University of PaduaIT351 papers
- Institute of Mathematical SciencesIN350 papers
- Institute of Space SciencesES347 papers
40 papers · 1 filter
The Correlated Block Renormalization Group
Miguel A. Martin-Delgado, Javier Rodriguez-Laguna, German Sierra
We formulate the standard real-space renormalization group method in a way which takes into account the correlation between blocks. This is achieved in a dynamical way by means of…
Subband energy in two-band delta-doped semiconductors
F. Dominguez-Adame
We study electron dynamics in a two-band delta-doped semiconductor within the envelope-function approximation. Using a simple parametrization of the confining potential arising fro…
Higher Syzygies of Elliptic Ruled Surfaces
Francisco Gallego, B. P. Purnaprajna
Let L be a normally generated line bundle on X; we say L satisfies property N_p (notation after Mark Green) if the matrices in the free resolution of R (the homogeneous coordinate…
Instabilities, Point Attractors and Limit Cycles in a Inflationary Universe
Luca Salasnich
We study the stability of a scalar inflaton field and analyze its point attractors in the phase space. We show that the value of the inflaton field in the vacuum is a bifurcation p…
The Current Star Formation Rate of the Local Universe
J. Gallego, J. Zamorano, A. Aragon-Salamanca +1
The Universidad Complutense de Madrid (UCM) Survey is a long-term project aiming at finding and analysing star-forming galaxies detected by their H emission in Schmidt objective…
Normal presentation on Elliptic Ruled surfaces
Francisco Gallego, B. P. Purnaprajna
In this article we determine exactly which line bundles on elliptic ruled surface X are normally presented. In particular we see that numerical classes of normally presented diviso…
The Renormalization Group Method and Quantum Groups: the postman always rings twice
Miguel A. Martin-Delgado, German Sierra
We review some of our recent results concerning the relationship between the Real-Space Renormalization Group method and Quantum Groups. We show this relation by applying real-spac…
Analytic Formulations of the Density Matrix Renormalization Group
Miguel A. Martin-Delgado, German Sierra
We present two new analytic formulations of the Density Matrix Renormalization Group Method. In these formulations we combine the block renormalization group (BRG) procedure with V…
New Universality Class in three dimensions: the Antiferromagnetic model
H. G. Ballesteros, L. A. Fernandez, V. Martin-Mayor +1
We present the results of a Monte Carlo simulation of the model in three dimensions with negative coupling. We observe a second order phase transition between the disordered…
A note on the GG-->PI 0 PI 0 reaction in the 1/N expansion of ChPT
A. Dobado, J. Morales
In this work we present the results of a complete calculation of the amplitude to leading order in the large approximation ( being the number of Gold…
Quantum Chaos in A=46--50 Atomic Nuclei
E. Caurier, J. M. G. Gomez, V. R. Manfredi +1
The spectral statistics of low--lying states of several shell nuclei are studied with realistic shell--model calculations. For Ca isotopes, we find significant deviations from…
Quantum Chaos in Vibrational Nuclei: the Green Function Approach
V. R. Manfredi, M. Rosa-Clot, L. Salasnich +1
We show that the collective vibrational model of atomic nuclei displays quantum chaos. To avoid the problems related to the tunneling effects, a Green function deterministic numeri…
Monte Carlo studies of antiferromagnetic spin models in three dimensions
J. L. Alonso, A. Tarancón, H. G. Ballesteros +3
We study several antiferromagnetic formulations of the O(3) spin model in three dimensions by means of Monte Carlo simulations. We discuss about the vacua properties and analyze th…
Quasi-Exactly Solvable Spin 1/2 Schrödinger Operators
Federico Finkel, Artemio Gonzalez-Lopez, Miguel A. Rodriguez
The algebraic structures underlying quasi-exact solvability for spin 1/2 Hamiltonians in one dimension are studied in detail. Necessary and sufficient conditions for a matrix secon…
The Role of Boundary Conditions in the Real-Space Renormalization Group
Miguel A. Martin-Delgado, German Sierra
We show that the failure of the real-space RG method in the 1D tight-binding model is not intrinsic to the method as considered so far but depends on the choice of boundary conditi…
Standard Model Anomalies in Curved Space-Time with Torsion
Antonio Dobado, Antonio L. Maroto
Using the Fujikawa and the heat-kernel methods we make a complete and detailed computation of the global, gauge and gravitational anomalies present in the Standard Model defined on…
Chaos Suppression in the SU(2) Yang--Mills--Higgs System
Luca Salasnich
We study the classical chaos--order transition in the spatially homogenous SU(2) Yang--Mills--Higgs system by using a quantal analog of Chirikov's resonance overlap criterion. We o…
Stability of the hard-sphere icosahedral quasilattice
H. M. Cataldo, C. F. Tejero
The stability of the hard-sphere icosahedral quasilattice is analyzed using the differential formulation of the generalized effective liquid approximation. We find that the icosahe…
Quantum Corrections to the Semiclassical Quantization of the SU(3) Shell Model
V. R. Manfredi, L. Salasnich
We apply the canonical perturbation theory to the semi--quantal hamiltonian of the SU(3) shell model. Then, we use the Einstein--Brillowin--Keller quantization rule to obtain an an…
Unitarity violation in non-abelian Pauli-Villars regularization
J. H. Leon, C. P. Martin, F. Ruiz Ruiz
We regularize QCD using the combination of higher covariant derivatives and Pauli-Villars determinants proposed by Slavnov. It is known that for pure Yang-Mills theory the Pauli-Vi…
Real Space Renormalization Group Methods and Quantum Groups
Miguel A. Martin-Delgado, German Sierra
We apply real-space RG methods to study two quantum group invariant Hamiltonians, that of the XXZ model and the Ising model in a transverse field defined in an open chain with appr…
Physical nature of critical wave functions in Fibonacci systems
Enrique Macia, Francisco Dominguez-Adame
We report on a new class of critical states in the energy spectrum of general Fibonacci systems. By introducing a transfer matrix renormalization technique, we prove that the charg…
A Monte Carlo study of O(3) antiferromagnetic models in three dimensions
J. L. Alonso, A. Tarancon, H. G. Ballesteros +3
We study three antiferromagnetic formulations of the O(3) spin model in three dimensions by means of Monte Carlo simulations: 1. a two parameter model with nearest and next to…
Lagrangian Theory of Constrained Systems: Cosmological Application
Giampiero Esposito, Gabriele Gionti, Giuseppe Marmo +1
Previous work in the literature has studied the Hamiltonian structure of an R-squared model of gravity with torsion in a closed Friedmann-Robertson-Walker universe. Within the fram…