论文标题
剪切流下的彩虹nambu-goldstone模式
Rainbow Nambu-Goldstone modes under a shear flow
论文作者
论文摘要
我们研究了剪切流的$ O（n）$标量模型及其与自发对称破坏$ O（n）\ to o（n-1）$相关的NAMBU-GOLDSTONE模式。我们发现，Nambu-Goldstone模式将无限数量的无间隙模式分解为我们称为Rainbow Nambu-Goldstone模式。他们具有不同的组速度和分数分散关系$ω\ sim k_1^{2/3} $，其中$ k_1 $是沿流量的波数。这种行为没有平衡状态的对应。
We study an $O(N)$ scalar model under shear flow and its Nambu-Goldstone modes associated with spontaneous symmetry breaking $O(N) \to O(N-1)$. We find that the Nambu-Goldstone mode splits into an infinite number of gapless modes, which we call the rainbow Nambu-Goldstone modes. They have different group velocities and the fractional dispersion relation $ω\sim k_1^{2/3}$, where $k_1$ is the wavenumber along the flow. Such behaviors do not have counterparts in an equilibrium state.
