- Kugelblitz (astrophysics)
theoretical physics, a kugelblitz is a concentration of lightso intense that it forms an event horizonand becomes self-trapped: according to general relativity, if we aim enough radiation into a region, the concentration of energy can warp spacetime enough for the region to become a black hole(although this would be a black hole whose original massenergyhad been in the form of radiant energy rather than matter).
Einstein's general theory of relativity, once an event horizon has formed, the type of massenergy that created it no longer matters.
The best-known reference to the kugelblitz idea in English is probably
John Archibald Wheeler's 1955 paper "Geons" [http://prola.aps.org/abstract/PR/v97/i2/p511_1] , which explored the idea of creating particles (or toy models of particles) from spacetimecurvature. Wheeler's paper on geons also introduced the idea that lines of electric charge trapped in a wormholethroat might be used to model the properties of a charged particle-pair.
* John Archibald Wheeler, "Geons", Phys. Rev. 97 511 - 536 (1955) [http://prola.aps.org/abstract/PR/v97/i2/p511_1]
* The fictional
Heecheecivilisation in the works of Frederick Pohl
* the phenomenon of
ball lightningis also sometimes referred to as a kugelblitz
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