Global time-dependent simulation.

[Van314159]

Hello! Thanks for this fantastic package!

I just want to ask if it is possible to simulate the dynamics of a global time-dependent many-body Hamiltonian. For example, I want to simulate the evolution of a quantum Ising model with a time-dependent transverse field. I reviewed the section on 'Time-dependent Hamiltonian' and noticed that the Ndrive keyword appears to only introduce time-dependent term on a single site. I attempted to set Ndrive as a vector (e.g., Ndrive=[1,2,3 ..., N]), but the runsim function threw an error. Is there a way to implement this functionality?

Thank you!

[BrieucLD]

Hi @Van314159,

Sorry for the late answer ! I did add some lines in the run_1TDVP.jl and other propagation method files to be able to give a list for Ndrive. An example is provided with the Spin-Boson Model in the 'Time-dependent Hamiltonian' doc section where the sites of the chain are driven in order to simulate a (a+a^\dagger) type of drive.

As mentioned in the example, this time-dependence can quickly become problem specific since it requires to be added to the constant part of the MPO, which can be spotted elsewhere than the example.

We can discuss together if you need further help!