Spring 2020

Classical Algorithms for Quantum Mean Values

Wednesday, February 26th, 2020 10:30 am11:00 am

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David Gosset (University of Waterloo)

Consider the task of estimating the expectation value of an n-qubit tensor product observable in the output state of a shallow quantum circuit. This task is a cornerstone of variational quantum algorithms for optimization, machine learning, and the simulation of quantum many-body systems. In this talk I will describe three special cases of this problem which are "easy" for classical computers. This is joint work with Sergey Bravyi and Ramis Movassagh.