High-fidelity hot gates for generic spin-resonator systems
M. J.A. Schuetz (Max-Planck-Institut für Quantenoptik)
G Giedke (Donostia International Physics Center, Basque Foundation for Science)
L.M.K. Vandersypen (Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab)
J. I. Cirac (Max-Planck-Institut für Quantenoptik)
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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 nonperturbative in the spin-resonator coupling strength, 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.