Neutrinos are elementary particles that are predicted to be massless by the standard model of particle physics, yet their ...

Since its development 100 years ago, quantum mechanics has revolutionized our understanding of nature, revealing a bizarre ...

A laser-equipped research platform has, for the first time, photographed airflow just millimeters above ocean waves, ...

These mechanisms operate simultaneously in different parts of the wave field—a crucial insight for advancing atmospheric and ...

The folded-waveguide (FWG) traveling-wave tube (TWT) is a promising high-power terahertz (THz) amplifier. However, it is challenging to develop THz FWG-TWT with high beam–wave interaction efficiency.

In this paper, a novel Eulerian nonlinear beam-wave interaction (BWI) theory considering harmonic interaction of a helix traveling-wave tube (TWT) is developed. Derived from this Eulerian model, the ...