论文标题
来自基本物理常数的声音速度
Speed of sound from fundamental physical constants
论文作者
论文摘要
从核合成的角度来看，二小无尺度的基本物理常数，良好的结构常数$α$和质子与电子质量比$ \ frac {m_p} {m_p} {m_e} $从核合成的角度，重型元素，行星和生命支持结构的形成来看，是非常重要的。在这里，我们表明，这两个常数的组合导致了一个新的无尺寸常数，该常数为凝结阶段的声音速度（$ v_u $）提供了上限。我们发现$ \ frac {v_u} {c} =α\ left（\ frac {m_e} {2m_p} {2m_p} \ right）^{\ frac {1} {2}}} $，其中$ c $是vacuum中的光速。我们通过对原子氢的大量实验数据和第一原理计算来支持这一结果。我们的结果扩展了对基本常数如何对重要物理特性施加新界限的当前理解。
Two dimensionless fundamental physical constants, the fine structure constant $α$ and the proton-to-electron mass ratio $\frac{m_p}{m_e}$ are attributed a particular importance from the point of view of nuclear synthesis, formation of heavy elements, planets, and life-supporting structures. Here, we show that a combination of these two constants results in a new dimensionless constant which provides the upper bound for the speed of sound in condensed phases, $v_u$. We find that $\frac{v_u}{c}=α\left(\frac{m_e}{2m_p}\right)^{\frac{1}{2}}$, where $c$ is the speed of light in vacuum. We support this result by a large set of experimental data and first principles computations for atomic hydrogen. Our result expands current understanding of how fundamental constants can impose new bounds on important physical properties.
