- #1

jdstokes

- 523

- 1

Then they write the inner product of [itex]|x\rangle[/itex] and [itex]|y\rangle[/itex] (say) by calling on the dual to [itex]|x\rangle[/itex]:

[itex]\langle x | y\rangle[/itex].

There appears to be a flaw in the logic here. To employ the Riesz rep theorem we must already have knowledge of the inner product on the state space.

How is this inner product explicitly defined in QM?? I can't see it written anywhere in Sakurai.