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Unselective ground-state blockade of Rydberg atoms for implementing quantum gates |
Jin-Lei Wu1, Yan Wang1, Jin-Xuan Han1, Shi-Lei Su2, Yan Xia3, Yongyuan Jiang1, Jie Song1() |
1. School of Physics, Harbin Institute of Technology, Harbin 150001, China 2. School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China 3. Department of Physics, Fuzhou University, Fuzhou 350002, China |
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Abstract A dynamics regime of Rydberg atoms, unselective ground-state blockade (UGSB), is proposed in the context of Rydberg antiblockade (RAB), where the evolution of two atoms is suppressed when they populate in an identical ground state. UGSB is used to implement a SWAP gate in one step without individual addressing of atoms. Aiming at circumventing common issues in RAB-based gates including atomic decay, Doppler dephasing, and fluctuations in the interatomic coupling strength, we modify the RAB condition to achieve a dynamical SWAP gate whose robustness is much greater than that of the nonadiabatic holonomic one in the conventional RAB regime. In addition, on the basis of the proposed SWAP gates, we further investigate the implementation of a three-atom Fredkin gate by combining Rydberg blockade and RAB. The present work may facilitate to implement the RAB-based gates of strongly coupled atoms in experiment.
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Keywords
Rydberg atoms
unselective ground-state blockade
SWAP gate
Fredkin gate
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Corresponding Author(s):
Jie Song
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Issue Date: 24 August 2021
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