恢复强KSS猜想
Resurrecting the Strong KSS Conjecture
摘要：
许多反例建议KSS界$\fracηs \ge \frac 1 {4π}$依赖于构建系统的大量物种。结果，熵密度变大，并且$\frac ηs$可以任意变小。然而，这些结构并不影响无量纲剪切粘度$\frac {ηT}{ε+ P}$，这与传统的$\frac ηs$只有在化学势为零时才一致。这就提出了一种可能性，即KSS类束缚对所有系统都成立，而不仅仅是UV完全量子场论，这与以前的理解相反。
英文摘要：
Many counterexamples to the proposed KSS bound $\fracηs \ge \frac 1 {4π}$ depend on constructing systems with large numbers of species. As a result, the entropy density grows large and $\frac ηs$ can be made arbitrarily small. However, these constructions do not affect the dimensionless shear viscosity $\frac {ηT}{ε+ P}$, which agrees with the traditional $\frac ηs$ only for vanishing chemical potential. This raises the possibility that a KSS-like bound holds for all systems, not just UV-complete quantum field theories, contrary to the previous understanding.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
