Add support for parametrized pulses #92
Draft
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This adds support for parametrized pulses by attaching an optional 'parametrization' attribute to control-functions and pulse arrays. The parametrization object stored in that attribute contains information for converting ϵ⟷u and calculating the derivative ∂ϵ/∂u. These are automatically taking into account when calculating the pulse updates (μ = (∂Ĥ/∂ϵ)⋅(∂ϵ/∂u) for an Ĥ that is linear in ϵ).
Thus, all internal storage is for the physical pulse values ϵ(t), and any conversion to u(t) is done on the fly as necessary. This ensures that everything stays 100% compatible with QuTiP, but adds a small overhead from the ϵ⟷u conversions compared to the "hacky" solution discussed in #23 (comment). The latter could still be used by an advanced user when performance is more critical than clarity.
Closes #23