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Black hole electron

In physics, there is a speculative notion that if there were a black hole with the same mass and charge as an electron, it would share many of the properties of the electron including the magnetic moment and Compton wavelength.

Micro black hole

On the other hand, the Compton wavelength, $\backslash lambda\; =\; h/Mc$, where h is Planck's constant, represents a limit on the minimum size of the region in which a mass M at rest can be localized.

Planck particle

A Planck particle, named after physicist Max Planck, is a hypothetical particle defined as a tiny black hole whose Compton wavelength is equal to its Schwarzschild radius.

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While opinions vary as to its proper definition, the most common definition of a Planck particle is a particle whose Compton wavelength is equal to its Schwarzschild radius.

see also

Micro black hole

For sufficiently small M, the reduced Compton wavelength ($\backslash scriptstyle\{\backslash lambda\; \backslash ;\; =\; \backslash ;\; \backslash hbar/Mc\}$, where ħ is Reduced planck constant) exceeds half the Schwarzschild radius, and no black hole description exists.