Abstract
Owing to the long lifetime of Rydberg atom, easy to operate and easy to control the interaction between Rydberg atoms, Rydberg atom has attracted considerable attention in quantum information and quantum optics fields. Specially, the anti-blockade effect, as a physical resource, can be used to implement various tasks in quantum information processing. Based on the rigid dipole blockade, an ensemble of two-level Rydberg atoms trapped in three magneto-optical traps can be regarded as a superatom. Based on the superatom model, the in-phase and anti-phase dynamics of the three-body Rydberg superatoms are studied by adjusting the numbers of atoms, and the W state and two kinds of maximal entangled states are generated simultaneously. Our work has great potential applications in coherent manipulation and quantum information processing.The numerical simulations are performed based on the superatom model and thereby the formidable obstacle that the Hilbert space dimension grows exponentially with the particle number increasing can be completely removed. As a result, the quantum control and quantum entanglement can be achieved from the single-quanta level to the mesoscopic level.
Highlights
easy to control the interaction between Rydberg atoms
an ensemble of two-level Rydberg atoms trapped in three magneto-optical traps can be regarded as a superatom
the inphase and anti-phase dynamics of the three-body Rydberg superatoms are studied by adjusting the numbers of atoms
Summary
关键词:里德堡原子, 超级原子, 偶极阻塞, 量子纠缠 PACS:42.50.Ct, 03.67.Bg, 42.50.Nn * 国家自然科学基金 (批准号: 11874004, 11204019)、吉林省教育厅科学基金 (批准号: JJKH20200557KJ)、吉林省科技厅 2021 年 自然科学基金 (批准号: 20210101411JC)、长春大学基金项目和吉林工程技术师范学院校级科研项目 (批准号: BSKJ201907) 资 助的课题. 个具有明显空间分离的子系综看作三个里德堡超 级原子 [28,29](简称: 超级原子), 而超级原子以及集 体态的方法, 可以规避量子系统随原子数目指数增 长带来的计算困难 [24]. 原子, 基态|g⟩=|5S1/2, F = 2⟩, 里德堡态|r⟩ = |90S⟩, 则范德瓦尔斯系数 C6 = 2π × 1.67 × 1013 s−1 · μm6 , 自发弛豫速率 Γ = 0.002 MHz [26,30,31], 保持激光场
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