Optimized ancillary drive for fast Rydberg entangling gates

• URL: http://arxiv.org/abs/2602.21512v1
• Date: Wed, 25 Feb 2026 02:57:49 GMT
• Title: Optimized ancillary drive for fast Rydberg entangling gates
• Authors: Rui Li, Min-Hua Zhang, Jing Qian,
• Abstract summary: We develop a fast implementation of two-qubit CZ gates using optimized ancillary drive to enhance the two-photon Rabi frequency.<n>Considering the experimentally feasible parameters for $87$Rb atoms, we demonstrate that the execution time required for such CZ gates can be shortened by more than 30$%$.
• Score: 9.586151547829987
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Reaching fast and robust two-qubit gates with low infidelities has been an outstanding challenge for the long-term goal of useful quantum computers. Typically, optimizing the pulse shapes can minimize the gate infidelity and improve its robustness to certain types of errors; yet it remains incapable of speeding up the gate execution time which is fundamentally restricted by the attainable Rabi frequency in a realistic setup. In this work, we develop a fast implementation of two-qubit CZ gates using optimized ancillary drive to enhance the two-photon Rabi frequency between the ground and Rydberg states.This ancillary drive can work in an error-robustness framework without increasing the original gate infidelity in the absence of the drive. Considering the experimentally feasible parameters for $^{87}$Rb atoms, we demonstrate that the execution time required for such CZ gates can be shortened by more than 30$\%$ as compared to standard two-photon protocols arising the gate fidelity above 0.9954 by taking account of all relevant error sources. Our results reduce the high-power laser requirement and unlock the potential toward fast, high-fidelity quantum operations for large-scale quantum computation with neutral atoms.

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