"Quantum Thursdays - Quantum Advantage of Embedding for Quantum Chemistry"

Presented by Yuan Liu, MIT

Thursday, March 16, 2023, 12:00 pm — Videoconference / Virtual Event (see link below)

We extend molecular bootstrap embedding to make it appropriate for implementation on a quantum computer. This enables the solution of the electronic structure problem of a large molecule as an optimization problem for a composite Lagrangian governing fragments of the total system, in such a way that fragment solutions can harness the capabilities of quantum computers. By employing state-of-art quantum subroutines including the quantum SWAP test and quantum amplitude amplification, we show how a quadratic speedup can be obtained over the classical algorithm, in principle. Utilization of quantum computation also allows the algorithm to match — at little additional computational cost — full density matrices at fragment boundaries, instead of being limited to 1-RDMs. Current quantum computers are small, but quantum bootstrap embedding provides a potentially generalizable strategy for harnessing such small machines through quantum fragment matching.

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