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posted by janrinok on Thursday September 09 2021, @07:05AM   Printer-friendly

Arthur T Knackerbracket has processed the following story:

An international team of researchers has developed a way to create non-radiating sources of electromagnetism. In their paper published in the journal Physical Review Letters, the group describes their technique and how well it worked when they tested a model based on their ideas.

For many years, physicists have grappled with the idea of "meta-atoms," macroscopic objects that have alternating current that prevents the emission of electromagnetic energy. In 1957, Yakov Zel'dovich came up with the idea of anapole states, where parity violations in electric current would produce electric moments with no poles. Since that time, some astrophysicists have suggested that such states could explain how dark matter remains hidden.

[...] Due to constraints in their lab, the team was forced to create a device based on microwaves rather than radio frequencies—they placed an 18-mm antenna inside of a 6.4-mm disk and put them into an anechoic chamber. They used another antenna to measure emissions from the device after it was turned on. They found the device able to support total suppression of far-field radiation. The researchers suggest their device could pave the way toward the development of new kinds of wireless power transfer devices.

Journal Reference:
Esmaeel Zanganeh, Andrey Evlyukhin, Andrey Miroshnichenko, et al. Anapole Meta-Atoms: Nonradiating Electric and Magnetic Sources, Physical Review Letters (DOI: 10.1103/PhysRevLett.127.096804)


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  • (Score: 3, Informative) by FatPhil on Thursday September 09 2021, @11:13AM (4 children)

    by FatPhil (863) <pc-soylentNO@SPAMasdf.fi> on Thursday September 09 2021, @11:13AM (#1176207) Homepage
    Can someone who knows their arse from an anapole explain what's moved on in the last 6 years? This from 2015 shares 2 of the same authors, and even some of the same images:

    Miroshnichenko, A., Evlyukhin, A., Yu, Y. et al.
    Nonradiating anapole modes in dielectric nanoparticles.
    Nat Commun 6, 8069 (2015).
    https://doi.org/10.1038/ncomms9069
    --
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  • (Score: 3, Funny) by Anonymous Coward on Thursday September 09 2021, @12:16PM (2 children)

    by Anonymous Coward on Thursday September 09 2021, @12:16PM (#1176225)

    The big change is spatial distortion. They can put an 18mm antenna inside a 6.4mm disk.

    • (Score: 2) by RS3 on Thursday September 09 2021, @04:57PM

      by RS3 (6367) on Thursday September 09 2021, @04:57PM (#1176305)

      Yeah, I was wondering about how they did that. Is that due to some quantum effect, or that dark matter is actually smaller than what you measure, or did they exceed the speed of light there with that? Pons and Fleischmann would have made that work.

    • (Score: 0) by Anonymous Coward on Thursday September 09 2021, @05:02PM

      by Anonymous Coward on Thursday September 09 2021, @05:02PM (#1176309)

      It's in the paper. They remodulated the Heisenberg compensators to match the subspace temporal signature.

  • (Score: 2, Funny) by Anonymous Coward on Thursday September 09 2021, @12:55PM

    by Anonymous Coward on Thursday September 09 2021, @12:55PM (#1176233)
    The authors ran out of money and needed to publish again?