Questions tagged [ising-model]

Refers to the mathematical model of ferromagnetism in statistical mechanics. The model consists of discrete variables that represent magnetic dipole moments of atomic "spins" that can be in one of two states (+1 or −1).

4 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
10
votes
0answers
102 views

Why does the Wolff algorithm slow down in a 4-body Ising model?

In the paper that introduced "Self-learning MC" (an ML-inspired MC technique, as I understand) the authors consider a many-body Ising model as an example to show the efficiency of their ...
8
votes
0answers
90 views

Coupling between 1st and 2nd order phase transitions?

I am seeking some models or references on how to couple, or what to take into consideration, while coupling first-order phase transitions (for magnetic systems) and second-order phase transitions, in ...
7
votes
0answers
35 views

How to choose the values of J and spin parameters in a heterogeneous spin system?

Previous questions (here, here and here) were about modeling magnetic homogeneous systems using Heisenberg and/or Ising hamiltonians: \begin{equation} \tag{Heisenberg} \hat{H}_H=-\sum_{\langle i j\...
6
votes
0answers
82 views

Is it possible to calculate/estimate the value of the J parameter to be used in the Heisengerg/Ising hamiltonians?

Studying magnetic systems, two frequently used approximations are the Heisenberg and Ising models (a discussion about these approximations can be read here): \begin{equation} \tag{Heisenberg} \hat{H}...