Seminar by Dr. Nicolas Didier: Hybrid quantum/classical computing on a 19-qubit processor based on parametrically-activated entangling gates

on the January 11, 2018

At 9.30am
In this joint Nanoélectronique Quantique and QUEST seminar, Nicolas Didier from Rigetti Computing (Berkeley, California) will explain the physics behind two-qubit gates, and how they enable the implementation of two distinct classes of entangling operations, describe many features that make this architecture attractive from a scalability perspective, and present how this gate architecture was used to demonstrate a hybrid algorithm for an unsupervised machine learning task known as clustering on a 19-qubit processor.
Superconducting devices are one of the most promising platforms for building quantum computers, but demonstrating fault-tolerance on any quantum computing implementation remains a challenge. In recent years new hybrid quantum/classical algorithms targeting near-term devices have been proposed, focusing on short-depth parameterized quantum circuits and using quantum computation as a subroutine embedded in a larger classical optimization loop, without the immediate need for fault-tolerance. Rigetti Computing has built a flexible computing platform targeting precisely such hybrid applications, relying on custom entangling gates based on parametrically-activated interactions. In this talk I will explain the physics behind these two-qubit gates, how it enables the implementation of two distinct classes of entangling operations, and describe many features that make this architecture attractive from a scalability perspective. Finally, I will present how this gate architecture was used to demonstrate a hybrid algorithm for an unsupervised machine learning task known as clustering on a 19-qubit processor.
 
References: arXiv:1712.05771, arXiv:1706.06570, arXiv:1706.06562, arXiv:1706.06566, arXiv:1608.03355, www.rigetti.com.


Published on January 23, 2018

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Centre National de la Recherche Scientifique (CNRS)
Salle Remy Lamaire (K223)
25 Avenue des Martyrs, 38000 Grenoble