Input of hopping gate only accepts lists

[fretchen]

Write now the hopping gate only accepts list, this is slightly awkward for a single global hopping parameter. Right now one has to write:

qc.hop_fermions([theta_j], list(range(0, 4)))

It would be more natural to be able to write:

qc.hop_fermions(theta_j, list(range(0, 4)))

[LaurinFischer]

I see what you mean. The hopping gate is built up from a generator that takes a list of different J_i as the hopping strength between tweezers i and i+1. In the case of two tweezers that might look a bit awkward.
I'm not a huge fan of interpreting a single parameter not within a list as a global hopping strength to avoid confusion.
Do you think it would make sense to rather have a dedicated gate for global hopping such as class GlobalHopping(FermionicGate) which only takes one parameter as input?

[fretchen]

I like the solution of the global hopping gate. There is even a point to be made that almost any gate in cold atoms should have a global implementation as this is the typical first step in the experiment and the local one is kind of 'unusual' or 'hard'.