WIP: rename sqrt_hop -> T_xn, use that it is never None
Mostly it's a cleanup MR since there's no way to generate a None
value of sqrt_hop
. The new name T_xn
is suggested by @cwg to indicate it is a basis transformation from the space of modes to the real (tight-binding space).
I did this on the fly, so I might have missed some other contexts where sqrt_hop
is appearing.
Blocked by kwant/algo-kwant-paper#2.
@michaelwimmer in particular interested in your opinion.