论文标题
手性极限的运输和流体力学
Transport and hydrodynamics in the chiral limit
论文作者
论文摘要
我们分析了在手性极限下$ t_c $低于$ t_c $的流体动力波动的演变，其中必须将乳头（金石模式）视为其他非亚洲超级超级自由度的自由度，反映了损坏的$ su_l（2）\ times \ times su_r（2）su_r（2）$对称该理论的对称性。在存在有限的锥度质量$m_π$的情况下，流体动力学理论是长距离的普通流体动力学，而在短距离处类似超氟。然后，自由度的超流体程度的存在对我们计算的长距离的散装粘度，剪切粘度和扩散系数给出了特定的贡献。在某些情况下，这决定了QCD对PION质量的转运参数的主要依赖性。当系统接近$ O（4）$关键点时，我们分析了该计算的预测。
We analyze the evolution of hydrodynamic fluctuations for QCD matter below $T_c$ in the chiral limit, where the pions (the Goldstone modes) must be treated as additional non-abelian superfluid degrees of freedom, reflecting the broken $SU_L(2) \times SU_R(2)$ symmetry of the theory. In the presence of a finite pion mass $m_π$, the hydrodynamic theory is ordinary hydrodynamics at long distances, and superfluid-like at short distances. The presence of the superfluid degrees of freedom then gives specific contributions to the bulk viscosity, the shear viscosity, and diffusion coefficients of the ordinary theory at long distances which we compute. This determines, in some cases, the leading dependence of the transport parameters of QCD on the pion mass. We analyze the predictions of this computation, as the system approaches the $O(4)$ critical point.
