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Generate transitions without spin projections #219

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redeboer opened this issue Apr 20, 2023 · 1 comment
Open

Generate transitions without spin projections #219

redeboer opened this issue Apr 20, 2023 · 1 comment
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@redeboer
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redeboer commented Apr 20, 2023

Problem description

QRules is intended to be a generic system of input (topologies), constraints (initial and final state) and selection rules (conservation laws). Currently it produces specific state transition objects with Particle instances on that edges that each have a float for spin projections.

These spin projections are however rather a kinematic thing (it depends on rest frame) and there is no quantum conservation rule for these projections alone (in other words, it's not an inherent quantum number that each state caries independent of reference frame).

Some issues related to generating all pin projections:

It should be possible to select a different number of input conditions (here: dropping spin projections of the initial and final states). This would allow generating transitions purely with spin magnitudes.

@redeboer
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redeboer commented May 6, 2024

@grayson-helmholz I updated the issue with a sketch of the steps we discussed. Can you create an issue for the first step? Either the fancy way (you should have the rights for that now) or just posting a new issue.

So, just a link to the python-constraints2 examples, sketch of the example you had in mind, and goal of the issue/task.

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