Interactive Learning
Explore Quantum Simulations
Interactive simulations of real quantum maths, right in your browser. Each one asks you to predict first, then shows the exact odds next to your results.
Quantum Technology Foundations
3 SimulationsFoundations
Bloch Sphere Explorer
Drag the state vector across the Bloch sphere. Every point is a valid qubit. The poles are |0⟩ and |1⟩.
Foundations
Complex Amplitude Explorer
Drag a point across the complex plane and watch its polar form update live — the geometry behind every qubit amplitude.
Foundations
No-Cloning Theorem
Try to build a machine that copies an unknown quantum state, and discover why it's mathematically impossible.
Quantum Evolution
3 SimulationsQuantum Evolution
Describing Evolution
See why unitary matrices — not arbitrary functions — are the only transformations that preserve a valid quantum state.
Quantum Evolution
Evolution Builder
Choose a Hamiltonian and steer a qubit precisely onto a target state on the Bloch sphere.
Quantum Evolution
Unitary Evolution
Move the time slider and watch a quantum state evolve continuously under a fixed Hamiltonian.
Quantum Measurement
3 SimulationsQuantum Measurement
Measurement Basis Explorer
Rotate the measurement axis independently of the state and see how outcome probabilities shift with your choice of basis.
Quantum Measurement
Measurement in Circuits
Build a small circuit, add a measurement gate mid-sequence, and track how the classical register captures the outcome.
Quantum Measurement
Partial Measurement Explorer
Measure only one qubit of a two-qubit state and watch the correlation table reveal what happens to its partner.
Multi-Qubit Systems & Entanglement
7 SimulationsMulti-Qubit Systems
Bell State Builder
Build the four Bell states with H and CNOT, check exactly when entanglement appears, and verify with trials. Your free taste of entanglement.
Multi-Qubit Systems
Tensor Product Explorer
Combine separate qubits with the tensor product and see why each new qubit doubles the numbers you need.
Multi-Qubit Systems
Controlled Gates Explorer
Apply CNOT and CZ to two qubits and read the truth table, state and odds. Find out what a truth table cannot show.
Multi-Qubit Systems
Entanglement Circuit Explorer
Build a circuit gate by gate and see exactly when two qubits become entangled, and when they stop.
Multi-Qubit Systems
Entanglement Explorer
Compare two-qubit states side by side and find the test that really separates entangled from separable.
Multi-Qubit Systems
Partial Trace Explorer
Trace out one qubit of a joint density matrix and see what the other qubit looks like on its own.
Multi-Qubit Systems
Schmidt Explorer
Decompose a two-qubit state into its Schmidt basis and coefficients, the clearest way to measure entanglement.
Quantum Information
4 SimulationsQuantum Information
Measuring Entanglement Explorer
Measure how entangled a two-qubit state is, with concurrence and entropy meters on a live slider.
Quantum Information
Quantum No-Go Explorer
Try to copy and to delete unknown quantum states, and see why linearity forbids both.
Quantum Information
Entanglement Entropy Explorer
See one entangled pair two ways, as the whole and as one qubit alone, and how entropy links them.
Quantum Information
Monogamy & Quantum Security Explorer
Let an eavesdropper touch one half of a Bell pair and see why she cannot learn anything without leaving errors.
Open Quantum Systems
8 SimulationsOpen Quantum Systems
Density Matrix Explorer
Build density matrices for pure and mixed states and see why they describe states no ket can.
Open Quantum Systems
Mixed State Explorer
Move inside the Bloch sphere and see what a mixed state looks like, and how it differs from a superposition.
Open Quantum Systems
Visualizing Mixed States
One density matrix, six views at once, and why a mixed state's history can never be read back from it.
Open Quantum Systems
Purity & Entropy Explorer
Track purity and entropy side by side as one noise slider moves a qubit from pure to fully mixed.
Open Quantum Systems
Decoherence Explorer
Let a qubit interact with its environment and watch its coherence fade, with no measurement at all.
Open Quantum Systems
T₁ & T₂ Explorer
Watch energy relax (T₁) and coherence fade (T₂), and discover the bound that links them: T₂ ≤ 2·T₁.
Open Quantum Systems
Noise Channel Explorer
Push a qubit through bit-flip, phase-flip, depolarizing and amplitude-damping noise, and learn each one's signature.
Open Quantum Systems
Quantum Information Resource Explorer
A capstone dashboard: build a two-qubit circuit with gates and noise, and watch every measure update together.
Quantum Mechanics Through Experiments
2 SimulationsQuantum Mechanics · Wave–Particle Duality
Mach-Zehnder Interferometer
Split a photon across two paths with a beam splitter, then recombine them, and see interference decide which detector fires.
Quantum Mechanics
Stern-Gerlach Experiment
Send silver atoms through an uneven magnetic field and see them land in two separate spots: one of the first experiments to show that spin comes in discrete values.
Quantum Computing
1 ToolQuantum Computing
Circuit Builder
Build circuits from a full gate palette, run shots, compare them with the exact odds, and export your circuit to Qiskit.