Nambu-Goldstone bosons with fractional-power dispersion relations
Nambu-Goldstone bosons with fractional-power dispersion relations
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具有分数幂色散关系的南部-戈德斯通玻色子
DOI：
10.1103/physrevd.89.101701
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发表时间：
2014
影响因子：
5
通讯作者：
H. Murayama
中科院分区：
文献类型：
--
作者：
Haruki Watanabe;H. Murayama
我们确定了超流体-超流体界面中畴壁波动的一种特殊色散关系的起源，即所谓的波纹子。由于有效拉格朗日量的非局域性，波纹子具有色散关系$\ensuremath{\omega}\ensuremath{\propto}{k}^{3/2}$，色散关系由体中的无间隙超流体声子介导。我们指出了二维维格纳晶体中纵向声子的类比。
We pin down the origin of a peculiar dispersion relation of domain wall fluctuation, the so-called ripplon, in a superfluid-superfluid interface. A ripplon has a dispersion relation $\ensuremath{\omega}\ensuremath{\propto}{k}^{3/2}$ due to the nonlocality of the effective Lagrangian, which is mediated by gapless superfluid phonons in the bulk. We point out the analogy to the longitudinal phonon in the two-dimensional Wigner crystal.