Phonons are sound particles or quantized vibrations of atoms in solid materials. The Debye model, a theory introduced by ...

A new quantum sensor can analyze the full spectrum of radio frequency and real-world signals, unleashing new potentials for soldier communications, spectrum awareness and electronic warfare. Army ...

Frequency comb: Georg Woltersdorf (left) and his colleague Chris Körner in the lab where they created a spin frequency comb. (Courtesy: Uni Halle/Markus Scholz) A simple method for multiplying the ...

Menlo's optical frequency combs are a core component of optical clocks, such as this one at JILA. (Courtesy: GE Marti/JILA) This year marks the 20th anniversary of the first time an optical-frequency ...

Russian physicists are building their first klystron generator, a critical particle accelerator component for which the country has previously had to rely on external suppliers in Europe or Japan. Now ...