One-step implementation of Rydberg-antiblockade SWAP and controlled-SWAP gates with modified robustness  

作　　者：JIN-LEI WU YAN WANG JIN-XUAN HAN YU-KUN FENG SHI-LEI SU YAN XIA YONGYUAN JIANG JIE SONG 

机构地区：[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

出　　处：《Photonics Research》2021年第5期814-821,共8页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(NSFC)(11675046,21973023,11804308);Program for Innovation Research of Science in Harbin Institute of Technology(A201412);Postdoctoral Scientific Research Developmental Fund of Heilongjiang Province(LBHQ15060);Natural Science Foundation of Henan Province(202300410481)。

摘　　要：The prevalent fashion of executing Rydberg-mediated two-and multi-qubit quantum gates in neutral atomic systems is to pump Rydberg excitations using multistep piecewise pulses in the Rydberg blockade regime.Here, we propose to synthesize a Λ-type Rydberg antiblockade(RAB) of two neutral atoms using periodic fields,which facilitates one-step implementations of SWAP and controlled-SWAP(CSWAP) gates with the same gate time. Besides, the RAB condition is modified so as to circumvent the sensitivity of RAB-based gates to infidelity factors, including atomic decay, motional dephasing, and interatomic distance deviation. Our work makes up the absence of one-step schemes of Rydberg-mediated SWAP and CSWAP gates and may pave a way to enhance the robustness of RAB-based gates.

关 键 词：RYDBERG neutral MODIFIED 

分 类 号：O413[理学—理论物理]