19 interactive tools
Every tool in this catalogue ships inside lesson pages — not in a separate "lab" section. The interaction is the instruction. Built on the pedagogical spine: See it → Touch it → Build it → Break it → Prove it.
"Grab the qubit. Rotate the universe."
3D Bloch sphere with live gate animation. Click any gate and watch the state vector fly through the rotation axis in real time. The first tool in every quantum course — because you cannot understand superposition until you can see it move.
Try it in Lesson 2.3 →"Amplitude is not probability. Both matter."
Multi-qubit amplitude bars, phase wheels, and density-matrix heatmaps in one panel. Understand the difference between |+⟩ and |−⟩ — states that are measurement-identical but interference-distinct.
Try it in Lesson 2.3 →"Drag the phase. Watch the interference."
Visualise the relative phase between basis states as an interference pattern on a virtual screen. The moment learners stop thinking 'phase is just a number' and start feeling it as a physical effect.
"Two qubits. One fate."
Bell-state explorer with animated correlation arrows and a myth-busting mode. Explicitly shows that measurement correlations cannot be used for faster-than-light signalling — the misconception that kills quantum intuition.
"Drop gates. See the state vector move. Edit the QASM live."
Interactive quantum circuit composer with drag-and-drop gates, live OpenQASM 2 editor, SVG probability histogram, and a per-qubit Bloch sphere driven by the actual simulation state vector. Educational warnings surface common misconceptions as you build.
Open tool →"Drag gates. Get code. Change the code. Watch the gates move."
Drag-drop quantum circuit composer with bidirectional sync to Qiskit/OpenQASM 3. Edit the visual circuit and the code updates live — or edit the code and the circuit redraws. The only way to learn circuit design is to build circuits.
Try it in Lesson 2.3 →"Every gate is a matrix. Every circuit is a product."
Unitary matrix inspector. Select any gate or any circuit and see the exact 2×2 (or 4×4) complex matrix, the rotation axis on the Bloch sphere, and the circuit identity it satisfies. Abstract algebra becomes concrete.
"Beat par. Climb the leaderboard."
Optimise a target unitary using the fewest gates and lowest depth. All-time leaderboard per challenge — circuit golf is naturally competitive and the single best way to build hardware intuition. The challenge that learners share on LinkedIn.
"Run 1 shot. Run 10,000. See the law of large numbers happen."
Shot-statistics simulator with animated histogram convergence. Run any circuit from 1 to 10,000 shots and watch the empirical distribution approach the theoretical probabilities in real time. Kills the 'measurement gives the answer I want' misconception permanently.
Try it in Lesson 2.3 →"Turn down T₁. Watch your qubit die."
Live T₁, T₂, gate-error, and readout-error sliders with real-time Bloch-sphere and histogram degradation. The only way to build intuition for noise is to cause it yourself and see the exact state it destroys.
"Real noise. No queue. No account."
Hardware-calibrated noise model simulator. Configure realistic T₁, T₂, gate error, and readout parameters and run against a simulation that behaves like a real quantum processor — today's coherence times, today's gate errors. The centrepiece of hardware-honest learning.
"See exactly where your fidelity goes."
Visual noise budget. A breakdown of total infidelity into T₁ decay, T₂ dephasing, gate errors, and readout errors, shown as a proportional area chart. Helps learners make informed circuit-level trade-offs before submitting to real hardware.
"Ideal. Twin. Real. Three histograms. One truth."
Three-way histogram diff: the same circuit run on the ideal simulator, the DeviceTwin, and optionally a real quantum hardware backend. When the twin prediction matches the real machine, the credibility moment is irreversible.
"Commit before you compute."
Every simulation is gated by a prediction. Learners choose their expected output before the circuit runs — the platform logs accuracy per concept and feeds prediction errors to the AI tutor as targeted misconception signals. The single highest-leverage interaction in the format.
Try it in Lesson 2.3 →"It never gives you the answer. It gives you a better question."
Socratic AI tutor powered by Claude. A bank of 40+ catalogued quantum misconceptions drives targeted questioning. Learners can highlight any sentence on the page and ask 'why?' — the tutor probes, not explains. Doubles as an accountability layer that notices stalls.
Try it in Lesson 2.3 →"Your prediction history is your knowledge map."
A personal record of every prediction made, its outcome, and the concept it tested. Accuracy trends per concept drive the adaptive-pathing engine — weak areas trigger inserted micro-modules. Learning is legible.
"Defend your circuit. Out loud."
AI oral examination after each capstone. Voice or text: 'Why did you place the Hadamard there? What happens if T₂ halves? Predict the histogram before I run it.' The layer MCQs can never reach — scored on explanation quality, prediction accuracy, and counterfactual reasoning.
"Shape the microwave. Calibrate the qubit."
Microwave pulse waveform editor powered by a virtual qubit backend. Drag to reshape a Gaussian drive, run Rabi and Ramsey experiments, calibrate a π-pulse — all inside the simulator. Pulse-level control made tactile.
"Find the error. Apply the correction. Beat the threshold."
Interactive surface-code decoder game. Syndromes are flagged on a live stabiliser grid — the learner matches them to Pauli corrections before the error count exceeds the code's threshold. The fastest path to intuition about why error correction is hard.
"Step inside the Bloch sphere."
Full WebXR walkthrough of multi-qubit state space. Walk through the interior of the Bloch ball (mixed states), observe entangled two-qubit correlations as 3D geometry, and navigate the dilution-fridge architecture layer by layer. No headset required — degrades to mouse-orbit WebGL.
"Drag the coupling. Watch the levels split."
Energy-level diagram for common qubit Hamiltonians. Interactive coupling-strength and drive-frequency sliders — as parameters change, energy levels split, merge, and cross in real time. Makes the Jaynes-Cummings model tangible before the math arrives.
Every tool is available to every learner in every track — no paywalls inside the curriculum. The certificate is the only paid layer.