Spin wave (= unreal quasiparticle ) is useless.

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Spin wave is useless

Spin wave (= unreal magnon quasiparticle ) is a very old useless concept representing magnetic fluctuation, which needs fake news and fake application to get research funds.

(Fig.1)  Fake news says useless spin wave may be useful for computers someday.

Unreal magnon quasiparticle or spin wave is useless.

Unreal magnon representing unstable magnetic fluctuation is useless for low-power computers, spintronics, contrary to fake news.

The 2nd, 6th, 8th, 9th paragraphs of this hyped news (9/25/2025) say

"I show that the spin waves (= just orbital magnetic fluctuation ) inside ferrimagnets—collective ripples of magnetization also known as magnons (= unreal useless quasiparticle ) — behave in a strikingly similar way to electrons and holes in semiconductors"

"right-handed (unreal) magnons behave like electrons (= wrong analogy ), left-handed magnons like holes"

"near 250 K where magnetization cancels, and a lower one about 70–80 K where the spin current vanishes."  ← this research is Not at room temperature, so No practical use.

"I believe this bosonic analogy can guide the development of technologies that convert heat into spin signals for low-power computing, sensing, and energy harvesting."  ← fake news

Impractical quantum mechanical spin research

↑ This research just talks about disappearance of short-lived magnetic fluctuation (= fake spin wave or magnon ) at some low temperature with No practical application.

Discrepancy between fake news and actual papers.

Actual papers say nothing about any practical use, contrary to fake news that tries to make useless quantum mechanics look promising.

↑ This research paper ↓

p.1-abstract says nothing about any practical use such as low-power computing, sensing, contrary to the above overhyped fake news.

p.7-left-last-paragraph says
"The theoretical framework developed in this work"  ← this research is just bout illusory theory with No experimental realization.

In this way, there is often a wide discrepancy between overhyped fake news (= citing many illusory application ) and actual papers (= No mention of any application ) to make today's deadend quantum mechanical researches "look advancing".

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