From our public film. Continue through Related Video.
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Original film notes and credits:
Can one gate change a qubit’s final answer? George and Mira build a one-qubit circuit together. Starting from zero, they compare H–H with H–Z–H, test what a Z gate changes, and show why adding a measurement in the middle creates a different experiment. The charts show ideal Z-basis probabilities, not measured hardware results.
00:00 Welcome George and Mira
00:17 Start with zero
00:40 One H gate
01:09 Two H gates
01:35 Change the phase with Z
02:03 The full H–Z–H circuit
02:33 What if we measure in the middle?
03:04 Ideal predictions versus real hardware
03:18 Predict the result
03:45 The circuit map
04:03 Subscribe and next episode
Learn more from IBM Quantum:
Superposition and interference:
Z-basis measurement:
Relative phase and circuit limits:
George and Mira are fictional illustrated presenters. Their voices are synthesized locally with Kokoro, and the circuit diagrams are original code animation. This video was reviewed by the channel owner before publication.
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