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Observation of Bose-Einstein condensates in an Earth-orbiting research lab 期刊论文
NATURE, 2020, 582 (7811) : 103-+
作者:  Yamamoto, Keisuke;  Venida, Anthony;  Yano, Julian;  Biancur, Douglas E.;  Kakiuchi, Miwako;  Gupta, Suprit;  Sohn, Albert S. W.;  Mukhopadhyay, Subhadip;  Lin, Elaine Y.;  Parker, Seth J.;  Banh, Robert S.;  Paulo, Joao A.;  Wen, Kwun Wah;  Debnath, Jayanta;  Kim, Grace E.;  Mancias, Joseph D.;  Fearon, Douglas T.;  Perera, Rushika M.;  Kimmelman, Alec C.
收藏  |  浏览/下载:48/0  |  提交时间:2020/07/03

Quantum mechanics governs the microscopic world, where low mass and momentum reveal a natural wave-particle duality. Magnifying quantum behaviour to macroscopic scales is a major strength of the technique of cooling and trapping atomic gases, in which low momentum is engineered through extremely low temperatures. Advances in this field have achieved such precise control over atomic systems that gravity, often negligible when considering individual atoms, has emerged as a substantial obstacle. In particular, although weaker trapping fields would allow access to lower temperatures(1,2), gravity empties atom traps that are too weak. Additionally, inertial sensors based on cold atoms could reach better sensitivities if the free-fall time of the atoms after release from the trap could be made longer(3). Planetary orbit, specifically the condition of perpetual free-fall, offers to lift cold-atom studies beyond such terrestrial limitations. Here we report production of rubidium Bose-Einstein condensates (BECs) in an Earth-orbiting research laboratory, the Cold Atom Lab. We observe subnanokelvin BECs in weak trapping potentials with free-expansion times extending beyond one second, providing an initial demonstration of the advantages offered by a microgravity environment for cold-atom experiments and verifying the successful operation of this facility. With routine BEC production, continuing operations will support long-term investigations of trap topologies unique to microgravity(4,5), atom-laser sources(6), few-body physics(7,8)and pathfinding techniques for atom-wave interferometry(9-12).


  
Contrasting contributions of flows on different time scales to tropical cyclone tracks over the South China Sea 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (3)
作者:  Cao, Xi;  Wu, Renguang;  Bi, Mingyu
收藏  |  浏览/下载:21/0  |  提交时间:2020/07/02
tropical cyclone track  the South China Sea  relative contribution  different time scales  
Intraseasonal variability of Tibetan Plateau snow cover 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019
作者:  Li, Wenkai;  Qiu, Bo;  Guo, Weidong;  Zhu, Zhiwei;  Hsu, Pang-Chi
收藏  |  浏览/下载:23/0  |  提交时间:2020/02/17
climatology  intraseasonal variability  multiple time scales  snow cover  Tibetan Plateau  
Comparison of North Atlantic Oscillation-related changes in the North Atlantic sea ice and associated surface quantities on different time scales 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019
作者:  Wu, Renguang;  Wang, Yuqi
收藏  |  浏览/下载:35/0  |  提交时间:2020/02/17
different time scales  meridional advection  NAO  sea ice concentration  surface air temperature  
Multi-model assessment of global temperature variability on different time scales 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019
作者:  Yu, Haipeng;  Wei, Yun;  Zhang, Qiang;  Liu, Xiaoyue;  Huang, Jianping;  Feng, Taichen;  Zhang, Meng
收藏  |  浏览/下载:24/0  |  提交时间:2019/11/27
coupled models  different time scales  surface air temperature  
Summer precipitation-SST relationship on different time scales in the northern tropical Indian Ocean and western Pacific 期刊论文
CLIMATE DYNAMICS, 2019, 52: 5911-5926
作者:  Wu, Renguang
收藏  |  浏览/下载:13/0  |  提交时间:2019/11/26
Rain rate-sea surface temperature relation  Different time scales  Precipitation change  Sea surface temperature change  
Time Scale Decomposition of Climate and Correction of Variability Using Synthetic Samples of Stable Distributions 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (5) : 3632-3658
作者:  Gomez-Garcia, M.;  Matsumura, A.;  Ogawada, D.;  Takahashi, K.
收藏  |  浏览/下载:13/0  |  提交时间:2019/11/26
bias correction of climate models  stable distributions  time scales of climate variability  
A Resampling Approach for Correcting Systematic Spatiotemporal Biases for Multiple Variables in a Changing Climate 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (1) : 754-770
作者:  Mehrotra, R.;  Sharma, A.
收藏  |  浏览/下载:14/0  |  提交时间:2019/04/09
three-dimensional bias correction  spatiotemporal biases  resampling  aggregated time scales  quantile mapping  climate model  
Continuous Assimilation of Lightning Data Using Time-Lagged Ensembles for a Convection-Allowing Numerical Weather Prediction Model 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (17) : 9652-9673
作者:  Wang, Haoliang;  Liu, Yubao;  Zhao, Tianliang;  Liu, Yuewei;  Xu, Mei;  Shen, Si;  Jiang, Yin;  Yang, Honglong;  Feng, Shuanglei
收藏  |  浏览/下载:14/0  |  提交时间:2019/04/09
Data assimilation  Lightning data  Convection-allowing scales  Time-lagged ensembles  EnKF  
On Which Microphysical Time Scales to Use in Studies of Entrainment-Mixing Mechanisms in Clouds 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (7) : 3740-3756
作者:  Lu, Chunsong;  Liu, Yangang;  Zhu, Bin;  Yum, Seong Soo;  Krueger, Steven K.;  Qiu, Yujun;  Niu, Shengjie;  Luo, Shi
收藏  |  浏览/下载:20/0  |  提交时间:2019/04/09
entrainment-mixing  clouds  time scales  observation  simulation