Counter-propagating, antiparallel-polarized plane-wave pulses can, in an idealized theoretical scenario, collapse into black holes near the Planck scale before Schwinger pair production dissipates the energy.
Extremal Black Holes in Cosmology from Colliding Light Beams
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abstract
From the duality between the interaction region of colliding waves and black holes (BHs) it is known that certain BH solutions can be obtained from colliding gravity coupled electromagnetic (em) waves. In the limit of vanishing gravity waves, we show that extremal Reissner-Nordstrom (RN) BH can form. We show also that direct collision of pure em waves creates the near horizon geometry (NHG) of the same BH, supporting our point. Due to the quantum restrictions such BHs can have horizon radii in the range $R>10^{8}m$. If such BHs from pure light do exist this may open a new frontier in our understanding of cosmological BHs at large. The generation of impulsive gravitational waves in the process may be instrumental in the detection of a BH created from pure light.
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Light Black Holes from Light
Counter-propagating, antiparallel-polarized plane-wave pulses can, in an idealized theoretical scenario, collapse into black holes near the Planck scale before Schwinger pair production dissipates the energy.