Place quantum gates to rotate your qubits to exactly the right state on the Bloch sphere, then leave no uncertainty for the final measurement to ruin.
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How to play
Each level asks you to transform the qubits into a target state by building a short gate circuit. A Bloch-sphere view shows where your state points. The catch is the measurement step: it collapses the state probabilistically, so you only win if you removed all uncertainty first.
Select gates and place them onto the circuit strip (up to eight gates).
For a controlled gate, choose the control qubit when prompted.
Use the Bloch sphere and probability readouts to confirm your state hit the target.
Run the measurement, if anything was left in superposition, it may collapse the wrong way.
Controls
Desktop: click a gate to select it, click the circuit to place it, then click Measure; switch Daily/Practice in the bar.
Phone & tablet: tap gates and the circuit to build, then tap Measure, fully touch-friendly.
Tips & strategy
Aim to land the state on a pole of the Bloch sphere so the probabilities read a clean 0 or 1 before measuring.
Order matters, quantum gates don't commute, so the same gates in a different sequence give a different state.
Keep the circuit short; every extra gate is another chance to drift off the target.
What you'll learn
Superposition makes the strange logic of quantum computing tangible, from gate rotations to irreversible measurement.
Skills: quantum computing, qubits and gates, superposition
Best for: advanced high school / college
For parents & teachers: the logic of quantum computing.
About Superposition
Superposition makes the strange logic of quantum computing tangible, from gate rotations to the irreversible collapse of a measurement. It's an original, free browser game with daily and practice levels that ramp through quantum-circuit tiers.
A free, original browser game on PlayPendium. No download, no install.
