QuTiP Propagators

[jeremy....@gmail.com]

Hello, I was trying to understand how propagators work by looking at the code. It seems that the psteady function in particular just calls mesolve, which I think is just an ODE solver. Is the actual propagator U calculated, ie the matrix U itself?

[Paul Nation]

Yes, by evolving basis vectors.

-P

On Jun 8, 2017 15:39, <jeremy....@gmail.com> wrote:

Hello, I was trying to understand how propagators work by looking at the code. It seems that the psteady function in particular just calls mesolve, which I think is just an ODE solver. Is the actual propagator U calculated, ie the matrix U itself?

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[jeremy....@gmail.com]

Thanks for the reply, could you point me to where the propagator matrix is calculated, I cannot find it.

[Paul Nation]

It is here:

https://github.com/qutip/qutip/blob/master/qutip/propagator.py

The output is U.