circuits / entanglement-swapping

Quantum Entanglement Swapping

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Entangles two qubits that never directly interact by performing a Bell measurement on intermediary qubits.

quantumcomputer.dev
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1OPENQASM 2.0;
2include "qelib1.inc";
3qreg q[4];
4creg c[4];
5// Bell pair 1
6h q[0]; cx q[0],q[1];
7// Bell pair 2
8h q[2]; cx q[2],q[3];
9// Bell measurement
10cx q[1],q[2]; h q[1];
11measure q -> c;

Cite this circuit

MIT
quantumcomputer.dev. "Quantum Entanglement Swapping". quantumcomputer.dev/circuits/entanglement-swapping. 2026.