YQI Talk - Eva Takou - Virginia Tech

Solid-state defect platforms offer an efficient spin-photon interface and long-lived nuclear spins, key properties for quantum networks. However, the always-on nature of the electron-nuclear spin interactions and resulting many-body dynamics make the generation of controllable entanglement challenging. In this talk, I will present a method for analyzing the electron-nuclear entanglement from the perspective of the entangling gate design. This description is a new analytical framework which characterizes the entanglement within an arbitrarily large electron-nuclear spin register, quantifies cross-talk and identifies optimal dynamical decoupling sequences for nuclear spin control. I will explain how this formalism can be exploited to speed up the entanglement generation through single-shot multipartite gates, and how to saturate all-way correlations in the presence of error rates applicable to state-of-the-art defect systems.

 

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