Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Berganza, Miguel Ibanez"'
Publikováno v:
Phys. Rev. B 92, 014204 (2015)
The thermodynamic properties of vector (O(2) and Complex Spherical) models with four-body interactions are analyzed. When defined in dense topologies, these are effective models for the nonlinear interaction of scalar fields in the presence of a stoc
Externí odkaz:
http://arxiv.org/abs/1412.8610
Langer theory of metastability provides a description of the lifetime and properties of the metastable phase of the Ising model field-driven transition, describing the magnetic field-driven transition in ferromagnets and the chemical potential-driven
Externí odkaz:
http://arxiv.org/abs/1403.4832
Publikováno v:
Phys. Rev. B 90, 041103 (2014)
Entanglement between blocks of energy-levels is analysed for systems exhibiting s-wave and p-wave superconductivity. We study the entanglement entropy and spectrum of a block of $\ell$ levels around the Fermi point, and also between particles and hol
Externí odkaz:
http://arxiv.org/abs/1307.8363
Autor:
Berganza, Miguel Ibáñez, Leuzzi, Luca
Publikováno v:
Physical Review B 88 (14), 144104 (2013)
The critical behavior of the O(2) model on dilute Levy graphs built on a 2D square lattice is analyzed. Different qualitative cases are probed, varying the exponent rho governing the dependence on the distance of the connectivity probability distribu
Externí odkaz:
http://arxiv.org/abs/1211.3991
Autor:
Rodriguez-Laguna, Javier, Migdał, Piotr, Berganza, Miguel Ibáñez, Lewenstein, Maciej, Sierra, Germán
Publikováno v:
New J. Phys. 14 053028 (2012)
A visualization scheme for quantum many-body wavefunctions is described, which we have termed qubism. Its main property is its recursivity: increasing the number of qubits reflects in an increase in the image resolution. Thus, the plots are typically
Externí odkaz:
http://arxiv.org/abs/1112.3560
Renyi and von Neumann entropies quantifying the amount of entanglement in ground states of critical spin chains are known to satisfy a universal law which is given by the Conformal Field Theory (CFT) describing their scaling regime. This law can be g
Externí odkaz:
http://arxiv.org/abs/1109.5673
Publikováno v:
Phys.Rev.Lett.106:201601,2011
In a quantum critical chain, the scaling regime of the energy and momentum of the ground state and low lying excitations are described by conformal field theory (CFT). The same holds true for the von Neumann and Renyi entropies of the ground state, w
Externí odkaz:
http://arxiv.org/abs/1101.2881
Publikováno v:
Philosophical Magazine, 88(33); 3931- 3938, 2008
The dynamics of the 2D Potts ferromagnet when quenched below the transition temperature is investigated in the case of discontinuous phase transition, which is interesting for understandingthe non equilibrium dynamics of systems with many competing e
Externí odkaz:
http://arxiv.org/abs/0810.2496
We investigate the non-equilibrium dynamics of the 2D Potts model on the square lattice after a quench below the discontinuous transition point. By means of numerical simulations of systems with q =12,24 and 48 we observe the onset of a stationary re
Externí odkaz:
http://arxiv.org/abs/0706.3534
Autor:
de Berganza, Miguel Ibanez, Ferrero, Ezequiel E., Cannas, Sergio A., Loreto, Vittorio, Petri, Albert
Publikováno v:
Eur. Phys. J. Special Topics 143 , 273 (2007)
When the two dimensional q-color Potts model in the square lattice is quenched at zero temperature with Glauber dynamics, the energy decreases in time following an Allen-Cahn power law, and the system converges to a phase with energy higher than the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610039