598APE-HW3

This repository contains code for homework 3 of 598APE.

This assignment is relatively simple in comparison to HW1 and HW2 to ensure you have enough time to work on the course project.

In particular, this repository implements a 2D Ising model Monte Carlo simulator (with Metropolis–Hastings algorithm) on an L×L lattice with periodic boundary conditions.

To compile the program run:

make -j

To clean existing build artifacts run:

make clean

This program assumes the following are installed on your machine:

• A working C compiler (gcc is assumed in the Makefile)
• make
• ImageMagick convert for PNG output

Usage (after compiling):

./main.exe <L> <temperature> <steps>

In particular, consider speeding up simple run like the following (which runs ~5 seconds on my local laptop under the default setup):

./main.exe 100 2.269 100000

Exact bitwise reproducibility is not required; sanity checks on energy/magnetization bounds must pass. In addition, at the critical temperature (T ≈ 2.269) the energy per spin should approach -1.414 in equilibrium.