| Realization of 87Rb Bose–Einstein Condensates in Higher Bands of a Hexagonal Boron-Nitride Optical Lattice |
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| 作者姓名： | 刘金玉 王小琼 许志芳 |
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| 作者单位： | 1. Department of Physics,Harbin Institute of Technology;2. Department of Physics,Southern University of Science and Technology;3. Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology |
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| 基金项目： | supported by the National Key R&D Program of China (Grant Nos. 2022YFA1404103 and 2018YFA0307200);;the KeyArea Research and Development Program of Guangdong Province (Grant No. 2019B030330001);;the National Natural Science Foundation of China (Grant No. 12274196); |
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| 摘 要： | Ultracold neutral atoms in higher bands of an optical lattice provide a natural avenue to emulate orbital physics in solid state materials. Here, we report the realization of 87Rb Bose–Einstein condensates in the fourth and seventh Bloch bands of a hexagonal boron-nitride optical lattice, exhibiting remarkably long coherence time through active cooling. Using band mapping spectroscopy, we observe that atoms condensed at the energy minimum of L point(K1 and K2 points) in the...
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