Beat frequencies of two lasers irradiating a surface appear in _Stimulation of Optical Phonons in Deuterated Palladium_ by Dennis Letts and Peter Hagelstein https://www.lenr-canr.org/acrobat/LettsDstimulatio.pdf
Harry On Mon, Oct 12, 2020 at 11:20 PM H LV <hveeder...@gmail.com> wrote: > I wonder if quanta are made from beat frequencies: > > hf = h|f1- f2| > > where |f1- f2| is the absolute value of the difference between the > frequencies of two interfering *classical* vibrations. > > Perhaps ordinarily the existence of the other frequencies produce no > observable effects but under special circumstances > they do. > > What I am proposing is related to the phenomena of quantum beats but > quantum beats involve the interference of two quanta or photons rather than > trying to explain why quanta exist. > > This article gives a history of the subject and interestingly the > existence of quantum beats has often been denied because semi-classical > quantum theory says they are impossible but quantum electrodynamics does > predict them. > https://bayes.wustl.edu/etj/articles/quantum.beats.pdf > > BTW the beat concept also played a role in thought of Louis de Broglie. > > Harry > > On Mon, Oct 12, 2020 at 3:16 PM JonesBeene <jone...@pacbell.net> wrote: > >> >> >> Yes. For instance, if your expectation is based on emission from a >> stationary emitter – then “ rotational superradiance” can alter and >> concentrate radiation from around the equator of the rapidly spinning >> emitter while the polar emission will be subradiant. No gain – simply a >> shift. >> >> >> >> >> >> >> >> The appearance of higher amplitude sound waves could seem, at first, like >> a path to net gain. >> >> >> >> Dicke "superradiance is involved as well as Fermi-Pasta-Ulam >> >> >> >> >> https://en.wikipedia.org/wiki/Fermi%E2%80%93Pasta%E2%80%93Ulam%E2%80%93Tsingou_problem >> >> >> >> >> >> Could this mean that under the right conditions a body could >> unexpectedly radiate more of its energy in the infrared region? >> >> >> >> Harry >> >> >> >> >> >> H LV wrote: >> >> >> >> >> >> Acoustic demonstration of beats >> >> https://www.youtube.com/watch?v=IYeV2Wq82fw >> >> >> >> This is not mentioned in the video but beats also arise and persist in a >> driven oscillator when no damping force is present. This happens because >> the driver`s frequency does not match the natural frequency of the >> oscillator. Beats will also initially appear in a driven oscillator when a >> damping force is present but they will fade away quickly. >> >> >> >> Harry >> >> >> >> >> >> >> >> >> >
