Enrique López-Moreno

TL;DR: In this paper, an analysis of the classical and quantum phase transitions of the Lipkin-Meshkov-Glick model is presented, and it is shown that the classical dynamics is ruled by the energy surface of the system.

TL;DR: For algebraic models the coherent states are appropriate trial wave functions to study the energy surfaces of the system by means of the separatrix of the catastrophe formalism, defined by the bifurcation and Maxwell sets.

TL;DR: In this article, a characterization of phase transitions and related accidental degeneracies is presented for a general spin Hamiltonian containing linear and quadratic terms, and the existence of first-, second-, and third-order phase transitions is exhibited.

TL;DR: In this paper, the Tavis-Cummings model is analyzed for any number of atoms by using a tensorial product of coherent states, and it is found that this "trial" state constitutes a very good approximation to the exact quantum solution, in that it globally reproduces the expectation values of the matter and field observables.

TL;DR: Thanks to a precise and automated control of laser conditions, laser-induced incandescence is originated at the material surface and produces high-resolution micropatterns that present properties normally induced with lasers of much greater energies in PDMS: formation of in situ nanodomains, local fluorescence and waveguide patterns.