Add backward propagating marks to Crumble #998
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Added 3 instructions:
REVMARKX,REVMARKZ,REVMARKYto address Issue #665.These create backward-propagating Pauli marks using the same logic as the forward-propagating ones. As suggested by @Strilanc, they do not interact with the forward-propagating marks.
They can be inserted using
shift+<Pauli>+<#>, and I’ve updated the GUI accordingly:To motivate this feature, here are two example use-cases:
Visualising how double-check in the cultivation procedure translates to measuring the logical operator twice (with two clicks)
Checking that an encoding circuit correctly encodes the logical operator by propagating it backward (with one click).
✅ Passed Crumble tests