VQE, Excited States, and Quantum Error Suppression

Publications Science

It’s been some time since our original hybrid quantum-classical algorithm, the variational quantum eigensolver (VQE), made its debut on a photonic quantum device.  Since that time there have been many developments, some of which I outlined in a previous post here.  I’m happy to say we’ve finally developed a reasonable way to access excited states without requiring …

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Expressive power, deep learning, and tensors

Literature Science

Tensors are kind of like the wild west of applied math these days.  They are a brave new territory and somewhat dangerous with regards to procedures one might borrow from matrices. In particular, “Most tensor problems are NP-Hard”.  Despite this pessimistic result however, people are starting to utilize the additional structure available in tensor decompositions …

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