تقرير
Speed of sound from fundamental physical constants
العنوان: | Speed of sound from fundamental physical constants |
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المؤلفون: | Trachenko, K., Monserrat, B., Pickard, C. J., Brazhkin, V. V. |
المصدر: | Science Advances vol. 6, eabc8662 (2020) |
سنة النشر: | 2020 |
المجموعة: | Condensed Matter |
مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Statistical Mechanics |
الوصف: | Two dimensionless fundamental physical constants, the fine structure constant $\alpha$ 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 $\frac{v_u}{c}=\alpha\left(\frac{m_e}{2m_p}\right)^{\frac{1}{2}}$, 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. |
نوع الوثيقة: | Working Paper |
DOI: | 10.1126/sciadv.abc8662 |
URL الوصول: | http://arxiv.org/abs/2004.04818 |
رقم الأكسشن: | edsarx.2004.04818 |
قاعدة البيانات: | arXiv |
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