Welcome back to Quantumland

Welcome back to Quantumland

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Alice guide
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Qubit

Build the single-qubit pure-state model and learn how complex amplitudes become measurement probabilities.

Completely free

Every chapter, lab, assessment, and project is free.

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Recommended lab

Qubit State Explorer

Map amplitudes and relative phase to a Bloch-sphere picture without treating the picture as the definition.

Next project

Single-Qubit Field Notes

Create a compact reference that explains the first three chapters with equations, examples, and misconception checks.

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