Level 1
Qubits
A qubit is a two-outcome quantum system whose state is described by amplitudes until measurement.
Visualize
Think of the qubit state as a point you can rotate, not as a tiny switch hiding a secret answer.
Understand
The simulator starts a qubit at |0>, then gates change its amplitudes.
Why it matters
Useful circuits shape amplitudes so measurement favors useful answers.
Misconception
A qubit does not reveal unlimited information when measured; it gives one classical outcome.
Apply
Run H on one qubit and compare counts for 0 and 1.
Example DSL
# Hadamard superposition qubits 1 H 0 MEASURE 0
Quick check
What do you get from measuring one qubit once?