期刊
OPTICS EXPRESS
卷 27, 期 16, 页码 23080-23094出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.27.023080
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资金
- National Natural Science Foundation of China (NSFC) [11474094, 11604086, 11104076]
- Science and Technology Commission of Shanghai Municipality [18ZR1412800]
- ECNU Academic Innovation Promotion Program for Excellent Doctoral Students [YBNLTS2019-023]
- Specialized Research Fund for the Doctoral Program of Higher Education [20110076120004]
- Foundation of Henan Educational Committee (China) [01026631082, 14A140032]
Rydberg blockaded gate is a fundamental ingredient for scalable quantum computation with neutral Rydberg atoms. However the fidelity of such a gate is intrinsically limited by a blockade error coming from a Rydberg level shift that forbids its extensive use. Based on a dark-state adiabatic passage, we develop a novel protocol for realizing a two-atom blockade-error-free quantum gate in a hybrid system with simultaneous van der Waals (vdWsI) and resonant dipole-dipole interactions (DDI). The basic idea relies on converting the roles of two interactions, which is, the DDI serves as one time-dependent tunable pulse and the vdWsI acts as a negligible middle level shift, as long as the adiabatic condition is preserved. We adopt an optimized super-Gaussian optical pulse with k pi (k >> 1) area accompanied by a smooth tuning for the DDI, composing a circular stimulated Raman adiabatic passage, which can robustly ensure a faster operation time similar to 80ns as well as a highly-efficient gate fidelity similar to 0.9996. This theoretical protocol offers a flexible treatment for hybrid interactions in complex Rydberg systems, enabling on-demand design of new types of effective Rydberg quantum gate devices. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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