Supersonic Rotation of a Superfluid: A Long-Lived Dynamical Ring.
Supersonic Rotation of a Superfluid: A Long-Lived Dynamical Ring.
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超流体的超音速旋转：长寿命的动力环。
DOI：
10.1103/physrevlett.124.025301
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发表时间：
2019
影响因子：
8.6
通讯作者：
H. Perrin
中科院分区：
文献类型：
--
作者：
Yan;R. Dubessy;Mathieu de Goër de Herve;Avinash Kumar;T. Badr;A. Perrin;L. Longchambon;H. Perrin
我们提出了一个长寿命的量子气体在非谐势旋转的超流流的实验实现，由自己的角动量维持。气体通过旋转椭圆形变形的捕集器而运动。选择性的角动量蒸发会产生旋转加速，直到密度在陷阱中心消失，导致每个粒子的角动量为1.350 μ m的动态环。环的密度分布对应于准二维超流体，线速度达到18马赫，旋转持续超过一分钟。
We present the experimental realization of a long-lived superfluid flow of a quantum gas rotating in an anharmonic potential, sustained by its own angular momentum. The gas is set into motion by rotating an elliptical deformation of the trap. An evaporation selective in angular momentum yields an acceleration of rotation until the density vanishes at the trap center, resulting in a dynamical ring with ≃350ℏ angular momentum per particle. The density profile of the ring corresponds to the one of a quasi two-dimensional superfluid, with a linear velocity reaching Mach 18 and a rotation lasting more than a minute.