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arXiv · 2408.17048

Efficient generation of multiqubit entanglement states using rapid adiabatic passage

Shijie Xu·Xinwei Li·Xiangliang Li·Jinbin Li·Ming Xue
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Abstract

We propose the implementation of a rapid adiabatic passage (RAP) scheme to generate entanglement in Rydberg atom-array systems. This method transforms a product state in a multi-qubit system into an entangled state with high fidelity and robustness. By employing global and continuous driving laser fields, we demonstrate the generation of two-qubit Bell state and three-qubit W state, via sequential RAP pulses within the Rydberg blockade regime. As an illustrative example, applying this technique to alkali atoms, we predict fidelities exceeding 0.9995 for two-qubit Bell and three-qubit W state, along with excellent robustness. Furthermore, our scheme can be extended to generate entanglement between weakly coupled atoms and to create four-qubit Greenberger- Horne-Zeilinger states through spatial correlations. Our approach holds the potential for extension to larger atomic arrays, offering a straightforward and efficient method to generate high-fidelity entangled states in neutral atom systems.

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Shijie Xu, Xinwei Li, Xiangliang Li, Jinbin Li, Ming Xue. 2024-08-30. Efficient generation of multiqubit entanglement states using rapid adiabatic passage. https://doi.org/10.1103/physreva.110.023108

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