Expected output
Counts cluster around 00 and 11.
Core intuition
H makes q0 uncertain; CX copies the classical-looking branch into q1 without measuring.
Visual circuit
H 0 then CX 0 1, followed by two measurements.
Significance
Bell pairs are the entry point for teleportation, protocols, and correlation tests.
Limit
It creates correlation, not faster-than-light communication.
Circuit DSL
# Bell qubits 2 H 0 CX 0 1 MEASURE 0 MEASURE 1
Challenge
Remove CX. What disappears?