Physics & Maths simulations
Physics & Maths simulations
Interactive physics and maths simulations that run entirely in your browser.
Ising & XY model simulator
A Monte Carlo simulation that runs entirely in your browser. Drag the temperature through the phase transition and watch a lattice of spins order and disorder, and coarse-grain configurations with block-spin renormalisation.
It also simulates the two-dimensional XY model, whose planar spins are drawn as hue, so you can watch vortices and antivortices bind and unbind across the topological Berezinskii–Kosterlitz–Thouless transition.
Double-slit experiment simulator
The most beautiful experiment in physics, running in your browser: an electron gun fires electrons one at a time at a wall with two slits. Each electron lands as a single dot on the detection screen, yet the dots build up an interference pattern — until you switch on a detector that observes which slit each electron goes through, and the pattern collapses into two classical heaps.
Persistent homology visualisation
Sample points off a noisy shape and grow a disc of radius \(\varepsilon/2\) around each one. Two points join with an edge once their discs touch; three points fill in with a triangle once all three overlap. Whatever loop is left over — a closed path that isn't the edge of any triangle — is a hole; counting pieces and holes this way is what mathematicians call \(H_0\) and \(H_1\).
A live barcode tracks exactly when each hole opens and closes as \(\varepsilon\) grows, so a real hole (a long bar) is easy to tell apart from noise (a short one).
