The Schrödinger equation, made visible.
A pedagogical platform for physics, blending clearly written course notes with simulations you can tune and watch evolve in real time.
Read the theory
Typeset course notes with real LaTeX — the physics stays front and center.
Tune the parameters
Drag sliders and watch the potential and its eigenstates reshape instantly.
Watch it evolve
Stream a wavepacket in real time and scrub through its evolution frame by frame.
Modules
Explore quantum mechanics →The Schrödinger equation
The evolution postulate, and why everything reduces to an eigenvalue problem.
Measurement
The measurement postulate: possible outcomes, the Born rule, wavefunction collapse — and why the operator has to be Hermitian.
The ammonia maser
A two-level Hamiltonian with off-diagonal coupling: symmetric and antisymmetric states, the tunneling oscillation between them, and how it becomes a maser.
The wavefunction
What is the wavefunction? How do we define it in position and momentum space, and how do we interpret it?
Harmonic oscillator
Quantised energy levels and the zero-point energy.
Bound states of the finite well
Parity, the graphical construction, and how many states a well holds.
Tunneling through a barrier
Transmission and reflection at a finite potential step.
Particle in a 2D well
Separable states, and degeneracy as lattice points on an ellipse.
Atomic orbitals
3D electron density of hydrogen-like states, in spherical coordinates.
Spin measurement
Successive measurements, collapse, and the Bloch sphere.