Quantum bit flip
Use the Pauli-X gate as the quantum version of NOT.
Back to learning pathSingle-qubit statesWhy this experiment matters
What you will do
Connect a familiar classical bit flip with a rotation of a quantum state.
- 01
Start with |0⟩ at the north pole.
- 02
Increase the X rotation toward 180°.
- 03
Measure when the state reaches |1⟩.
Predict before you measure
Choose one answer to unlock the measurement.
INTERACTIVE
Interactive model
Move the control, then run a measurement. This is a teaching simulation—not hardware output.
Choose one answer to unlock the measurement.
Predict before you measureMake a prediction, then run the measurement to reveal the expected and sampled results.
Measurement results
What the result shows
A full X gate changes |0⟩ to |1⟩ with certainty; partial rotations create superposition.
GUIDED VIDEO
Watch the experiment
Follow the experiment with English narration and English subtitles.
Connect a familiar classical bit flip with a rotation of a quantum state.
Full transcript5 · 1:00
- 01Overview
Connect a familiar classical bit flip with a rotation of a quantum state.
- 02Experiment steps 1
Start with |0⟩ at the north pole.
- 03Experiment steps 2
Increase the X rotation toward 180°.
- 04Experiment steps 3
Measure when the state reaches |1⟩.
- 05What to observe
A full X gate changes |0⟩ to |1⟩ with certainty; partial rotations create superposition.
06 · CHECK
Check what you learned
Make a prediction, then run the measurement to reveal the expected and sampled results.