Quantum Teleportation: Bloch Sphere 3D

Bloch-Sphere Teleportation

Polar angle θ 55°

Azimuth φ 30°

Channel distance 1.2 ls

Phase

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Bell outcome

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Correction gate

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Fidelity

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How it works

Each Bloch sphere's arrow is a real qubit state |ψ⟩ = cos(θ/2)|0⟩ + e^{iφ}sin(θ/2)|1⟩, so the full 2-angle state — not just a projection — is what gets teleported here, in 3D, from Alice's sphere (left) to Bob's sphere (right).

Bell pair A,B: entangled, linked by the pulsing beam
Alice measures (C,A) jointly → 2 random classical bits
Bob applies: 00→I  01→X(σx)  10→Z(σz)  11→XZ(σxσz)

The two glowing bits physically travel along the arc between the spheres at a rate set by the channel-distance slider (in light-seconds) — the arrival delay you can watch is the same one the article means by "this information travels at or below the speed of light." Bob's arrow only starts rotating toward Alice's original orientation once the bits actually arrive.

θ, φ — the exact state being teleported, as a point on the Bloch sphere rather than a flat circle.
Channel distance — how long the classical bits take in flight; increase it and the "instant" correlation from entanglement still can't beat this delay.
Decoherence — jitters the shared Bell pair before use, so even a correct correction gate lands Bob's arrow slightly off Alice's original — the real-world fidelity limit the article's FAQ describes.

Alice's qubit C Bob's qubit B Classical bits in flight Recovered state

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Quantum Teleportation: Bloch Sphere (3D)