Catch up
Make amplitudes, matrices and measurements intuitive with short experiments.
Reconstruct
Connect classroom derivations to predictions and measurable quantities.
Explore further
Inspect limits, approximations, topology and trainable quantum models.
Nine chapters · Physical investigations
Choose a physical experiment
Explore a physical question, make a prediction, and test it against quantitative results. Each experiment includes derivations, model assumptions and questions for independent study.
01 · Basic ConceptsSequential Stern–GerlachPostselection · Density operators · Exact and finite-shot probabilitiesOpen interactive experiment ↗
02 · Quantum DynamicsHarmonic oscillatorCoherent and squeezed states · Wave packets · Wigner phase spaceOpen interactive experiment ↗
03 · Angular Momentum / CompositesEntanglement and partial traceSchmidt probabilities · Reduced entropy · Joint correlationsOpen interactive experiment ↗
04 · Approximation MethodsAvoided crossingsPerturbation breakdown · Exact energies · Eigenvector mixingOpen interactive experiment ↗
05 · Scattering TheoryPartial-wave scatteringAngular interference · Cross sections · Optical theoremOpen interactive experiment ↗
06 · Many-Body SystemsFermion ordering signsFock occupations · Parity factors · AnticommutatorsOpen interactive experiment ↗
07 · Relativistic QMKlein–Gordon and DiracRelativistic spectra · Probability current · Low-energy limitOpen interactive experiment ↗
08 · Topological MatterSSH bulk and boundariesWinding · Gaps · Exact finite-chain edge eigenstatesOpen interactive experiment ↗
09 · Quantum MLTraining quantum circuitsParameter shift · Loss optimization · Measurement noiseOpen interactive experiment ↗
Explore by chapter or concept
Choose an investigation or reading topic
Loading the nine-chapter inventory…
Featured investigations are shown first. Use the collection filter to find introductory exercises, all interactive experiments or guided reading.