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Add `Observer`-like functionality to `optimize` function #25

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mtfishman opened this issue Jul 27, 2021 · 0 comments

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mtfishman commented Jul 27, 2021

Add functionality for passing an object which performs measurements within iterations of gradient descent, similar to the Oberver system in dmrg.

Helpful for measuring properties of the PEPS (such as fidelity with an exact result, local expectation values, etc.).

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