Información del autor
Autor Finkel Morgenstern, Federico |
Documentos disponibles escritos por este autor (41)
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
![Selecciones disponibles](./images/orderby_az.gif)
![]()
texto impreso
Finkel Morgenstern, Federico ; González López, Artemio ; Rodríguez González, Miguel Ángel | American Institute of Physics | 1997-06The 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 second-order differential operator preserving a space of wave function[...]![]()
texto impreso
Enciso, A. ; Finkel Morgenstern, Federico ; González López, Artemio ; Rodríguez González, Miguel Ángel | Elsevier Science BV | 2005-01-06We construct new solvable rational and trigonometric spin models with near-neighbors interactions by an extension of the Dunkl operator formalism. In the trigonometric case we obtain a finite number of energy levels in the center of mass frame, [...]![]()
texto impreso
Finkel Morgenstern, Federico ; González López, Artemio ; López Maroto, Antonio ; Rodríguez, M.A. | American Institute of Physics | 2001The most general inflaton potential in Minkowski spacetime for which the differential equation for the Fourier modes of the matter fields reduces to Lame's equation is shown to be of the form V(?) = ? ? ^(4) /4 + K ?^( )2 /2 + ?/(2 ?^( 2) ) + V_[...]![]()
texto impreso
Enciso, Alberto ; Finkel Morgenstern, Federico ; González López, Artemio | American Physical Society | 2009-06We show that the density of energy levels of a wide class of finite-dimensional quantum systems tends to a Gaussian distribution as the number of degrees of freedom increases. Our result is based on a variant of the central limit theorem which i[...]![]()
texto impreso
Carrasco, José A. ; Finkel Morgenstern, Federico ; González López, Artemio ; Rodríguez, Miguel A. | American Physical Society | 2017-01-17We study the critical behavior and the ground-state entanglement of a large class of su(1|1) supersymmetric spin chains with a general (not necessarily monotonic) dispersion relation. We show that this class includes several relevant models, wit[...]![]()
texto impreso
Barba, J. C. ; Finkel Morgenstern, Federico ; González López, Artemio ; Rodríguez González, Miguel Ángel | EPL Association, European Physical Society | 2008-07According to a long-standing conjecture of Berry and Tabor, the distribution of the spacings between consecutive levels of a "generic" integrable model should follow Poisson's law. In contrast, the spacings distribution of chaotic systems typica[...]![]()
texto impreso
We compute the spectrum of the su(m) spin Sutherland model of B-N type, including the exact degeneracy of all energy levels. By studying the large coupling constant limit of this model and of its scalar counterpart, we evaluate the partition fun[...]![]()
texto impreso
Finkel Morgenstern, Federico ; González López, Artemio ; López Maroto, Antonio ; Rodríguez González, Miguel Ángel | American Physical Society | 2000-10-17We show that the most general inflaton potential in Minkowski spacetime for which the differential equation for the Fourier modes of the matter fields reduces to Lame's equation is of the form V(phi)=lambda phi^4/4+Kphi^2/2+mu/(2 phi^2)+V_0. As [...]![]()
texto impreso
In this paper we study the su(m) spin Sutherland (trigonometric) model of D-N type and its related spin chain of Haldane-Shastry type obtained by means of Polychronakos's freezing trick. As in the rational case recently studied by the authors, w[...]![]()
texto impreso
Finkel Morgenstern, Federico ; González López, Artemio ; León Yebra, Carlos ; Rodríguez González, Miguel Ángel | IOP Publishing | 2018-04We study the thermodynamics and critical behavior of su(m|n) supersymmetric spin chains of Haldane-Shastry type with a chemical potential term. We obtain a closed-form expression for the partition function and deduce a description of the spectru[...]![]()
texto impreso
Enciso, Alberto ; Finkel Morgenstern, Federico ; González López, Artemio | Elsevier Masson | 2012-11We study the thermodynamic properties of spin chains of Haldane-Shastry type associated with the A(N-1) root system in the presence of a uniform external magnetic field. To this end, we exactly compute the partition function of these models for [...]