Schwarzschild radius and the Compton wavelength both combine to say that in theory, the minimum mass required for a quantum black hole is the Planck mass(ish).

Schwarzschild radius and the Compton wavelength both combine to say that in theory, the minimum mass required for a quantum black hole is the Planck mass(ish). They might not be possible or they might require more energy than what we can produce today. https://link.springer.com/article/10.1140/epjc/s10052-017-5464-7 https://link.springer.com/article/10.1140/epjc/s10052-017-54... This article looks interesting and will probably go into more detail if you are wanting to know more. I will read it tomorrow. Great question!