Proposal for practical Rydberg quantum gates using a native two-photon excitation

Understand

Rydberg quantum gate serving as an indispensable computing unit for neutral-atom quantum computation, has attracted intense research efforts for the last decade.

• However the state-of-the-art experiments have not reached the high gate fidelity as predicted by most theories due to the unexpected large loss remaining in Rydberg and intermediate states.
• In this paper we report our findings in constructing a native two-qubit controlled-NOT gate based on pulse optimization.
• We focus on the method of commonly-used two-photon Rydberg excitation with smooth Gaussian-shaped pulses which is straightforward for experimental demonstration.