Exact Solutions of the Ising Model 来自 mysciencework.com 喜欢 0 阅读量: 18 作者: L Ridderstolpe 摘要: This report presents the general Ising model and its basic assumptions. This study aims to, from diagonalization of the Transfer Matrix, obtain the Helmholtz free energy and the exclusion of...
We will map out the whole phase diagram based on this analysis and confirm our results with high accuracy using exact diagonalization method and density matrix renormalization group (DMRG) method. In “Ferromagnetic phases”, we will discuss the three ferromagnetic phases. In “Model and Hamiltonian...
We present a new open-source Python package for exact diagonalization and quantum dynamics of spin(-photon) chains, called QuSpin, supporting the use of various symmetries in 1-dimension and (imaginary) time evolution for chains up to 32 sites in length. The package is well-suited to study,...
The phase diagram of a frustrated S=1/2 antiferromagnetic spin ladder with additional next-nearest neighbor exchanges, both diagonal and inchain, is studied by a weak-coupling effective field theory approach combined with exact diagonalization for finite systems. In addition to two known phases with...
The model takes into account the Ising interaction between the localized spins, the Hubbard interaction between the itinerant electrons, and the Ising interaction between electron and spin subsystems. To solve this model, a combination of small cluster exact diagonalization calculations and quantum Monte...
The conditions for the appearance of the phase transition in such systems are discussed. It is shown that the calculation of the partition function of the random 2D Ising model is reduced to the calculation of the determinant.关键词: petrofabric analysis sulfides scanning electron microscopy ...
It is shown that a spin-12 Ising model with thermodynamically distributed nonmagnetic impurities is equivalent to the Blume- Emery-Griffiths model. By exact diagonalization of the transfer matrix, results are obtained for the statistical sum and the internal energy of the chain.V.D....
We present analytic and numerical results for the ground state of a dynamical hole in a quantum Ising antiferromagnet (the t-Jz model) on a two-... T.,Barnes,E.,... - 《Physical Review B》 被引量: 39发表: 1989年 Exact diagonalization study of the two-dimensional t-J model with adi...
Conformal field theory central charge of a critical Ising model from dmrgpy import spinchain n = 100 # number of sites spins = ["S=1/2" for i in range(n)] # spin 1/2 heisenberg chain sc = spinchain.Spin_Chain(spins) # create the spin chain h = 0 # initialize for i in range...
Majorana amplitudes of the two nearly zero-energy eigenstates of the Ising-Kitaev chain (1)–(2) withN1 = 10,M = 20, andN2 = 14 in the piece-wise uniform applied field (3). The red dots represent the result of the exact numerical diagonalization. The curves represent the...