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Problem-tailored variational quantum algorithms

Thursday May 6, 2021
3:30 pm

 Presenter:  Sophia Economou, Virginia Tech
 Series:  CQuIC Seminars
 Abstract:  The performance of variational quantum algorithms (VQAs) critically depends on the objective function, which in turn relies on the form of the variational ansatz. A good ansatz translates to relatively shallow circuits and involves a low number of classical optimization parameters. These features can be achieved more easily if the ansatz knows something about the problem that is simulated. In this talk, I will give a brief background on VQAs and present our techniques for problem-tailored ansatze. These include symmetry-preserving circuits, the ADAPT-VQE algorithm, and a pulse-based VQE, which we named ctrl-VQE. Our simulations show that these techniques outperform competing ansatze in terms of circuit depth and accuracy.
 Host:  Susan Atlas
 Location:  Zoom

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