One-step implementation of Toffoli gate for neutral atoms based on unconventional Rydberg pumping

Abstract

Compared with the idea of universal quantum computation, a direct synthesis of a multiqubit logic gate can greatly improve the efficiency of quantum information processing tasks. Here we propose an efficient scheme to implement a three-qubit controlled-not (Toffoli) gate of neutral atoms based on unconventional Rydberg pumping. By adjusting the strengths of Rabi frequencies of driving fields, the Toffoli gate can be achieved within one step, which is also insensitive to the fluctuation of the Rydberg-Rydberg interaction. Considering different atom alignments, we can obtain a high-fidelity Toffoli gate at the same operation time $\sim 7\mu s$. In addition, our scheme can be further extended to the four-qubit case without altering the operating time.

arXiv commentTo be published in Optics Express

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• Unselective ground-state blockade of Rydberg atoms for implementing quantum gates
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• Simulation of a feedback-based algorithm for quantum optimization for a realistic neutral atom system with an optimized small-angle controlled-phase gate
• Long-range $CC\Phi$ gates via radio-frequency-induced Förster resonances
• Holonomic swap and controlled-swap gates of neutral atoms via selective Rydberg pumping
• Sublinear Classical-to-Quantum Data Encoding using $n$-Toffoli Gates