A microscopic calculation of the force on a wire moving through superfluid3He-B in the ballistic regime
A microscopic calculation of the force on a wire moving through superfluid3He-B in the ballistic regime
复制标题
弹道状态下穿过超流体 3He-B 的金属丝上的力的微观计算
DOI：
10.1007/bf00682120
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发表时间：
1991
影响因子：
2
通讯作者：
R. Watts
中科院分区：
文献类型：
--
作者：
S. Fisher;G. Pickett;R. Watts
当一个宏观物体在超流3 He中运动时，它会受到一个由准粒子散射效应产生的力。我们开发了一个三维微观模型来计算一个光滑的圆柱体上的力以恒定的速度v作为模型的振动线。在大的（亚临界）线速度下，力趋于渐近值1/v2，而不是像一维计算中那样呈指数变化。在低v时，力是线性的。我们简要地讨论了协议，我们的计算与实验测量的振动线低于0.2Tc，准粒子的弹道轨迹。
When a macroscopic object moves through superfluid3He, it experiences a force arising from the effect of quasiparticle scattering. We develop a three-dimensional microscopic model to calculate the force on a smooth cylinder moving at constant velocityv as a model of a vibrating wire. At large (subcritical) wire velocity, the force tends to an asymptotic value as 1/v2, rather than exponentially as in a one-dimensional calculation. At lowv the force is linear inv. We briefly discuss the agreement of our calculations with experimental measurements on a vibrating wire below 0.2Tc, where the quasiparticle trajectories are ballistic.