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- W4302774973 abstract "Fewer-qubit quantum logic gate, serving as a basic unit for constructing universal multiqubit gates, has been widely applied in quantum computing and quantum information. However, traditional constructions for fewer-qubit gates often utilize a multi-pulse protocol which inevitably suffers from serious intrinsic errors during the gate execution. In this article, we report an optimal model about universal two- and three-qubit CNOT gates mediated by excitation to Rydberg states with easily-accessible van der Waals interactions. This gate depends on a global optimization to implement amplitude and phase modulated pulses via genetic algorithm, which can facilitate the gate operation with fewer optical pulses. Compared to conventional multi-pulse piecewise schemes, our gate can be realized by simultaneous excitation of atoms to the Rydberg states, saving the time for multi-pulse switching at different spatial locations. Our numerical simulations show that a single-pulse two(three)-qubit CNOT gate is possibly achieved with a fidelity of 99.23$%$(90.39$%$) for two qubits separated by 7.10 $mu$m when the fluctuation of Rydberg interactions is excluded. Our work is promising for achieving fast and convenient multiqubit quantum computing in the study of neutral-atom quantum technology." @default.
- W4302774973 created "2022-10-07" @default.
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- W4302774973 date "2021-12-16" @default.
- W4302774973 modified "2023-09-23" @default.
- W4302774973 title "Optimal model for fewer-qubit CNOT gates with Rydberg atoms" @default.
- W4302774973 doi "https://doi.org/10.48550/arxiv.2112.08747" @default.
- W4302774973 hasPublicationYear "2021" @default.
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