Bad Qubits — Learn Quantum by Doing

|q⟩ Bad Qubits

Multiple choice

The final Hadamard in Deutsch's algorithm maps the register qubit to a computational basis state. What are

H|+\rangle

and

H|-\rangle

?

$H|+\rangle = |0\rangle$ and $H|-\rangle = |0\rangle$
$H|+\rangle = |+\rangle$ and $H|-\rangle = |-\rangle$
$H|+\rangle = |1\rangle$ and $H|-\rangle = |0\rangle$
$H|+\rangle = |0\rangle$ and $H|-\rangle = |1\rangle$