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Image: Bell State Decoder

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Description: The state labeled "EPR Pair" is a two-qubit entangled state with one qubit on each wire. A CNOT operation with the first qubit as control, followed by a Hadamard transform on the first qubit, produces an unentangled (product) state of the two qubits |a> and |b>, each of which are in exactly one of the computational basis states |0> or |1>. The mapping is unique so the circuit uniquely takes Bell Basis states to two-qubit Computational Basis states (in other words this circuit is a change of basis).
Title: Bell State Decoder
Credit: Own work
Author: Krisch53
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
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