ising-model | Python implementation of the Ising model

by bdhammel Python Version: Current License: Unlicense

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | ising-model Summary

ising-model is a Python library typically used in Simulation applications. ising-model has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.

Python code to simulate the Ising model of a Ferromagnet. For a discussion of the theory, visit my blog post. The initial conditions of the ising lattice can be specified by the tempature, initial state, and size parameters of the model. Running the simulation will output a video of system as it changes through out the run steps.

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ising-model has a low active ecosystem.

It has 29 star(s) with 11 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

ising-model has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of ising-model is current.

Quality

ising-model has no bugs reported.

Security

ising-model has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

ising-model is licensed under the Unlicense License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

ising-model releases are not available. You will need to build from source code and install.

Build file is available. You can build the component from source.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed ising-model and discovered the below as its top functions. This is intended to give you an instant insight into ising-model implemented functionality, and help decide if they suit your requirements.

Runs the fitting algorithm
Return the index of the index i
Calculate the energy of a system
Compute the internal energy

Get all kandi verified functions for this library.

ising-model Key Features

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ising-model Examples and Code Snippets

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Community Discussions

Trending Discussions on ising-model

How to use prange in cython?

Ising model simulation offset critical temperature

QUESTION

How to use prange in cython?

Asked 2020-Nov-08 at 18:14

I'm trying to solve a 2D-Ising model with Monte Carlo approach.

As it is slow I used Cython to accelerate the code execution. I would like to push it even further and parallelize the Cython code. My idea is to split the 2D-lattice in two, so for any point on a lattice has it's nearest neigbours on the other lattice. This way I can randomly choose one lattice and I can flip all the spins and this could be done in parallel since all those spins are independent.

So far this is my code :
_{( inspired from http://jakevdp.github.io/blog/2017/12/11/live-coding-cython-ising-model/ )}

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ANSWER

Answered 2020-Jun-07 at 18:39

From a Cython point-of-view the main problem is that cy_spin_flip requires the GIL. You need to add nogil to the end of its signature, and set the return type to void (since by default it returns a Python object, which requires the GIL).

However, np.exp and np.random.rand also require the GIL, because they're Python function calls. np.exp is probably easily replaced with libc.math.exp. np.random is a bit harder, but there's plenty of suggestions for C- and C++-based approaches: 1 2 3 4 (+ others).

A more fundamental problem is the line:

Source https://stackoverflow.com/questions/62249186

QUESTION

Ising model simulation offset critical temperature

Asked 2018-Apr-05 at 11:27

I'm writing a simulation of the Ising model in 2D. The model behaves as predicted except for one thing: the critical temperature is roughly 3.5 while it should be near 2/ln(2 + sqrt (2)).

The project is a C++ program that generates the data, and a shell script that exercises the program. The full code can be found here. Also here's lattice.cpp

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ANSWER

Answered 2018-Apr-05 at 11:27

I have found a few issues in your code:

The compute_dE method returns the wrong energy, as the factor of 2 shouldn't be there. The Hamiltonian of the Ising system is

While you are effectively using
The compute_energy method returns the wrong energy. The method should iterate over each spin pair only once. Something like this should do the trick:

for (unsigned int i = 0; i < max; i++) { for (unsigned int j = i + 1; j < max; j++) { energy_sum += other.compute_point_energy(i, j); } }
You use a temperature that is updated on the fly instead of using the target temperature. I do not really understand the purpose of that.

Source https://stackoverflow.com/questions/49661195

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install ising-model

You can download it from GitHub.
You can use ising-model like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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