Results 41 to 50 of about 2,455,001 (344)
Ising expansion for the Hubbard model [PDF]
Physical Review B, 1995 22 pages, 6 Postscript figures ...
Rajiv R. P. Singh, Zhu-Pei Shi
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, 2018 This chapter provides a general introduction of network modeling in psychometrics. The chapter starts with an introduction to the statistical model formulation of pairwise Markov random fields (PMRF), followed by an introduction of the PMRF suitable for ...
Aggen +80 more
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Nonequilibrium Zaklan model on Apollonian Networks
, 2012 The Zaklan model had been proposed and studied recently using the equilibrium Ising model on Square Lattices (SL) by Zaklan et al (2008), near the critica temperature of the Ising model presenting a well-defined phase transition; but on normal and ...
André A. Moreira +13 more
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Mathematics, 2021 A method of the Riemann–Hilbert problem is applied for Zhang’s conjecture 1 proposed in Philo. Mag. 87 (2007) 5309 for a ferromagnetic three-dimensional (3D) Ising model in the zero external field and the solution to the Zhang’s conjecture 1 is ...
Osamu Suzuki, Zhidong Zhang
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The grammar of the Ising model: A new complexity hierarchy [PDF]
arXiv, 2022 How complex is an Ising model? Usually, this is measured by the computational complexity of its ground state energy problem. Yet, this complexity measure only distinguishes between planar and non-planar interaction graphs, and thus fails to capture properties such as the average node degree, the number of long range interactions, or the dimensionality ...
arxiv
Gaps in the Heisenberg-Ising model [PDF]
Physical Review B, 1995 We report on the closing of gaps in the ground state of the critical Heisenberg-Ising chain at momentum $ $. For half-filling, the gap closes at special values of the anisotropy $ = \cos( /Q)$, $Q$ integer. We explain this behavior with the help of the Bethe Ansatz and show that the gap scales as a power of the system size with variable exponent ...
Rudolf A. Römer +2 more
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A general learning scheme for classical and quantum Ising machines
SciPost Physics CoreAn Ising machine is any hardware specifically designed for finding the ground state of the Ising model. Relevant examples are coherent Ising machines and quantum annealers. In this paper, we propose a new machine learning model that is based on the Ising
Ludwig Schmid, Enrico Zardini, Davide Pastorello
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Color Representations of Ising Models [PDF]
Journal of Theoretical Probability, 2020 AbstractIn Steif and Tykesson (J Prob 16:899–955, 2019), the authors introduced the so-called general divide and color models. One of the best-known examples of such a model is the Ising model with external field $$ h = 0 $$ h = 0 , which ...
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Phenomenological renormalizaiton group approach to the anisotropic two-layer Ising model
, 2003 The anisotropic two-layer Ising model is studied by the phenomenological renormalizaiton group method. It is found that the anisotropic two-layer Ising model with symmetric couplings belongs to the same universality class as the two dimensional Ising ...
Mardani, T., Mirza, B.
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Ising’s Roots and the Transfer-Matrix Eigenvalues
EntropyToday, the Ising model is an archetype describing collective ordering processes. As such, it is widely known in physics and far beyond. Less known is the fact that the thesis defended by Ernst Ising 100 years ago (in 1924) contained not only the solution
Reinhard Folk, Yurij Holovatch
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