I've been looking for the OAA paper but I've been unsuccessful in finding it. (so any links will also be helpful)
My question is essentially this, given the state:
$$\vert 0good \rangle + \vert 1bad \rangle$$
If I know the amplitudes of both states, can I amplify the amplitude of $\vert 0good \rangle$ without a reflection by the initial state using the flag qubit only? What conditions do I need to satisfy in order to do this?