Bell State (Φ+)
The simplest entangled state. Outcomes are always 00 or 11 — never 01 or 10.
2 qubits · 2 gates
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GHZ State (3 qubits)
Three-way entanglement. All three qubits agree, every single time.
3 qubits · 3 gates
Uniform Superposition
Hadamard on every qubit — all basis states become equally likely.
3 qubits · 3 gates
Grover's Search (2 qubits, |11⟩)
One Grover iteration finds the marked state |11⟩ with certainty.
2 qubits · 12 gates
Quantum Interference
H, then Z, then H again. The phase flip in the middle turns cancellation into reinforcement: the qubit lands on |1⟩ every single time. H·Z·H is exactly X.
1 qubit · 3 gates
Quantum Teleportation
Moves qubit 0’s state onto qubit 2 using entanglement — the coherent, deferred-measurement version, where two controlled gates stand in for the two classical bits. See teleport-classical for the version with real measurements.
3 qubits · 7 gates
Teleportation (real classical wires)
The same protocol with the measurements actually performed: Alice’s two bits land in the classical register, and Bob’s corrections are conditioned on them. Run it — the Bell result changes shot to shot, and qubit 2 arrives correct every time.
3 qubits · 9 gates
Superdense Coding (message 11)
Two classical bits carried by one qubit. Alice encodes “11” with a Z then an X on her half of a Bell pair; Bob undoes the entanglement and reads both bits off with certainty.
2 qubits · 6 gates