Abstract
We consider a nearest-neighbor-interaction ±J Ising spin glass in a square lattice. Inspired by natural evolution, we design a dynamic rule that includesselection, randomness, andmultibranch exploration. Following this rule, we succeed in walking along the space of states between local energy maxima and minima alternately. During the walk, we store various information about the spin states corresponding to these minima and maxima for later statistical analysis. In particular, we plot a histogram displaying how many times each minimum (or maximum) energy is visited as a function of the corresponding density value. Through finite-size scaling analysis, we conclude that a nonvanishing fraction of bonds remains unsatisfied (satisfied) at these energy minimum (maximum) states in the thermodynamic limit. This fraction measures the degree of unavoidable frustration of the system. Also in this limit, the width of these histograms vanishes, meaning that almost all metastable states occur at the same energy density value, with no dispersion.
References
C. Darwin,The Origin of Species (London, 1859).
S. A. Kauffman, inThe Economy as an Evolving Complex System, P. W. Anderson, K. J. Arrow, and D. Pines (Santa Fe Institute Studies in the Sciences of Complexity, Addison-Wesley, New York, 1988).
S. A. Kauffman,The Origin of Order (Oxford University Press, Oxford, 1993).
R. Dawkins,The Blind Watchmaker (Norton, New York, 1987).
P. M. C. de Oliveria, S. M. Moss de Oliveira, and S. L. A. de Queiroz,Physica A 175:345 (1991).
P. M. C. de Oliveira,Computing Boolean Statistical Models (World Scientific, Singapore, 1991).
J. P. Bouchaud,J. Phys. (Paris)12:1705 (1992).
J. P. Bouchaud, E. Vincent, and J. Hammann, preprint (1993).
H. E. Stanley, T. S. Chang, F. Harbus, and L. L. Liu, inProceedings of the International Summer School Enrico Fermi, Course LIX, K. A. Müller and A. Rigamonti, eds. (North-Holland, Amsterdam, 1976).
K. Binder and A. P. Young,Rev. Mod. Phys. 58:801 (1986).
J. Vannimenus and G. Toulouse,J. Phys. C 10:537 (1977).
E. E. Vogel, J. Cartes, S. Contreras, and J. Villegas,Phys. Rev. B (1993), submitted.
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Communicated by D. Stauffer
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Rodrigues, E.S., de Oliveira, P.M.C. Spin-glass energy landscape. J Stat Phys 74, 1265–1272 (1994). https://doi.org/10.1007/BF02188229
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DOI: https://doi.org/10.1007/BF02188229