High-Fidelity Hot Gates for Generic Spin-Resonator Systems

Abstract

We propose and analyze a high-fidelity hot gate for generic spin-resonator systems which allows for coherent spin-spin coupling, in the presence of a thermally populated resonator mode. Our scheme is non-perturbative, applies to a broad class of physical systems, including for example spins coupled to circuit-QED and surface acoustic wave resonators as well as nanomechanical oscillators, and can be implemented readily with state-of-the-art experimental setups. We provide and numerically verify simple expressions for the fidelity of creating maximally entangled states under realistic conditions.

Manuscript: 5 pages, 4 figures. Appendices: 23 pages, 16 figures. v2: version as published, Journal-Ref added

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