研究者提出声子可能有质量和负重力

诸平

Credit: CC0 Public Domain

据物理学家组织网（Phys.org）2018年8月15日报道，美国哥伦比亚大学（Columbia University）的3位物理学家合作，用声子新理论研究波动，他们得出的结论认为声子可能有负的质量,因此,它会有负重力。哥伦比亚大学物理系理论物理中心的安吉洛·埃斯波西托（Angelo Esposito）,拉斐尔·克里切夫斯基（Rafael Krichevsky）和阿尔贝托·尼克利斯（Alberto Nicolis）已经写了一篇论文来支持他们的理论,包括数学,并上传到 xrXiv 预印本服务器。

The mass of sound

Angelo Esposito, Rafael Krichevsky, Alberto Nicolis

(Submitted on 23 Jul 2018)

We show that the commonly accepted statement that sound waves do not transport mass is only true at linear order. Using effective field theory techniques, we confirm the result found in [Phys. Rev. B97, 134516 (2018), 1705.08914] for zero-temperature superfluids, and extend it to the case of solids and ordinary fluids. We show that, in fact, sound waves do carry mass---in particular, gravitational mass. This implies that a sound wave not only is affected by gravity but also generates a tiny gravitational field. Our findings are valid for non-relativistic media as well, and could have intriguing experimental implications.

Submission history

From: Angelo Esposito [view email] 
[v1] Mon, 23 Jul 2018 18:05:05 GMT (16kb)