Dark and heavy

CHRISTOPH BECKER

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Dark and heavy

机译：黑暗而沉重

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In 1834, the Scottish engineer John Scott Russell made a fascinating discovery. He observed a solitary water wave that travelled along a narrow canal for several miles without any significant change in its shape or amplitude. Ever since, such solitary waves, known as solitons, have been thought to have a key role in fundamental transport processes in myriad nonlinear systems - ranging from fibre-optic and meteorological systems to biological and astrophysical ones. On page 426 of this issue, Yefsah et al.demonstrate the first experimental realization of'dark solitons' in an ultracold quantum gas of strongly interacting fermionic atoms. Strikingly, they observe that the dynamics of a soliton in such a gas is slowed down by almost a factor of 20 compared with state-of-the-art theoretical predictions.

机译：1834年，苏格兰工程师John Scott Russell做出了一个有趣的发现。他观察到一条孤水波沿着一条狭窄的运河行进了几英里，其形状或振幅没有任何明显变化。从那时起，人们一直认为这样的孤波（称为孤子）在无数非线性系统（从光纤和气象系统到生物和天体物理系统）的基本传输过程中具有关键作用。在本期的第426页上，Yefsah等人演示了在强相互作用的铁离子原子的超冷量子气体中“暗孤子”的第一个实验实现。令人惊讶的是，他们发现，与最新的理论预测相比，这种气体中孤子的动力学速度降低了近20倍。

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来源
《Nature》 |2013年第7459期|413-414|共2页
作者
CHRISTOPH BECKER;
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作者单位

Institute for Laser Physics, University of Hamburg, 22761 Hamburg, Germany;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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正文语种 eng
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Dark and heavy

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