next up previous contents
Next: * Qubit 4: HADAMARD-Gate Up: The Two-Level System: Measurements Previous: Qubit 2 (5 min)   Contents

Qubit 3: NOT-Gate (5 min)

Construct the quantum mechanical operator `NOT' that flips the qubit

$\displaystyle \vert\rangle \to \vert 1\rangle,\quad \vert 1\rangle \to \vert\rangle .$

Write `NOT' as a two-by-two matrix in the basis $ \{\vert\rangle = (1,0)^T,\vert 1\rangle =(0,1)^T\}$. How does 'NOT' operate on a general qubit?


Tobias Brandes 2004-02-04