Echoes of fluid spin

• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2020,（1）
• 页码范围: 2-3
• 页数: 2页
• 语种: 英文
• DOI: 10.1093/nsr/nwz153

摘要

Spin—an intrinsic angular momentum carried by elementary particles—has long been thought to be exclusive to quantum mechanical systems.The spin of photons,for example,is associated with the vectorial nature of electromagnetic waves [1].In classical systems,however,the concept of a spinning degree of freedom is not as well defined.For instance,sound is often considered to be spinless due to the longitudinal and scalar-pressure field description of acoustic waves.