circuits / superdense-coding

Superdense Coding

✓FEATURED

Sends 2 classical bits using 1 qubit by leveraging a shared Bell pair.

quantumcomputer.dev
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Source Code

OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
creg c[2];
// Create Bell pair
h q[0];
cx q[0],q[1];
// Encode 11
z q[0];
x q[0];
// Decode
cx q[0],q[1];
h q[0];
measure q -> c;

Cite this circuit

MIT
quantumcomputer.dev. "Superdense Coding". quantumcomputer.dev/circuits/superdense-coding. 2026.