Zobrazeno 1 - 10
of 516
pro vyhledávání: '"Barreto, F."'
Autor:
Mota, A. L., Barreto, F. C. Sá
Correlation identities are obtained for $Z_3$ lattice gauge theory where the bonds of the plaquettes are decorated by generalized three-state Ising variables. Making use of correlation inequalities we obtain the area decay of the Wilson loop observab
Externí odkaz:
http://arxiv.org/abs/2402.12277
Publikováno v:
Condensed Matter Physics, 2022, vol. 25, No. 1, 13702
This work investigates the magnetic properties and the magnetocaloric effect in the spin-1 Blume-Capel model. The study was carried out using the mean-field theory from the Bogoliubov inequality to obtain the expressions of free energy, magnetization
Externí odkaz:
http://arxiv.org/abs/2203.14136
Autor:
BARRETO, F. T. C.
Publikováno v:
Repositório Institucional da UFESUniversidade Federal do Espírito SantoUFES.
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O cisalhamento resultante da intera
Externí odkaz:
http://repositorio.ufes.br/handle/10/10297
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Publikováno v:
Scientific Reports; 11/29/2024, Vol. 14 Issue 1, p1-12, 12p
Autor:
Barreto, F. C. Sá, Mota, A. L.
We obtain correlation functions for lattice gauge theories with action Boltzmann factor given by bond variables described by transverse Ising model and apply them to obtain area decay of the Wilson loop observable in a range of the coupling parameter
Externí odkaz:
http://arxiv.org/abs/1204.4615
Autor:
Barreto, F. C. Sá, Mota, A. L.
Publikováno v:
Physica A 391 (2012) 5908-5917
Starting from correlation identities for the Blume-Capel spin 1 systems and using correlation inequalities, we obtain rigorous upper bounds for the critical temperature.The obtained results improve over effective field type results.
Comment: 13
Comment: 13
Externí odkaz:
http://arxiv.org/abs/1204.0679
Autor:
Barreto, F. S. Sá, Mota, A. L.
Publikováno v:
J. Stat. Mech. 0512:P05006, 2012
Starting from an exact formal identity for the two-state transverse Ising model and using correlation inequalities rigorous upper bounds for the critical temperature and the critical transverse field are obtained which improve effective results.
Externí odkaz:
http://arxiv.org/abs/1202.2237
Autor:
Santos, L. B. L., Costa, M. C., Pinho, S. T. R., Andrade, R. F. S., Barreto, F. R., Teixeira, M. G., Barreto, M. L.
The transmission of vector infectious diseases, which produces complex spatiotemporal patterns, is analyzed by a periodically forced two-dimensional cellular automata model. The system, which comprises three population levels, is introduced to descri
Externí odkaz:
http://arxiv.org/abs/0810.0384
Using the Finite Size Scaling Renormalisation Group we obtain the two-dimensional flow diagram of the Blume-Capel model, for S = 1 and S = 3/2. In the first case our results are similar to those of Mean Field Theory, which predicts the existence of f
Externí odkaz:
http://arxiv.org/abs/cond-mat/9502100