He II中一个新的ripplon分支
A new ripplon branch in He II
摘要:
本文用色散流体力学方法分析了超流氦表面的涟波子的色散关系,发现了一个新的涟波子分支。得到了色散关系的解析方程和极限情况下的解析表达式。我们讨论了在能量波数平面中,涟波子可以存在的位置。在允许的范围内,得到了ripplon色散曲线的数值解。新的ripplon分支被发现在能量刚好低于不稳定点。
英文摘要:
We analyse the dispersion relation of ripplons, on the surface of superfluid helium, using the dispersive hydrodynamics approach and find a new ripplon branch. We obtain analytical equation for the dispersion relation and analytic expressions for the limiting cases. We discuss where ripplons can exist in the energy-wavenumber plane. A numerical solution for the ripplon dispersion curve is obtained in the allowed regions. The new ripplon branch is found at energies just below the instability point.
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