# Tag Info

### GRAPE with Python?

I ended up modifying qutip for this purpose and it was kind of painful. There are several classes that need to be modified. You can check my repo for that version. https://github.com/PiggsBoson/qutip
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In VQA, there are two subroutines: one is quantum and the other is classical. The quantum subroutine deals with exponentially large Hilbert space. Think of an $n$-qubit quantum circuit that evolves a \$...