A point-like particle with mass greater than the Planck mass is nothing but a black hole in Einstein’s theoryofgravity. This is because information of such a particle is hidden inside the horizon and is lost, as mentioned in Chap.  1 . In contrast, the asymptotically background-free quantum gravity suggests that there exists a localized excited stateExcited state of quantum gravity with mass exceeding the Planck mass, which has the size of the correlation length, has no singularity, and looks like a particle from the outside.

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Localized Massive Excitations of Quantum Gravity

  • Ken-ji Hamada

摘要

A point-like particle with mass greater than the Planck mass is nothing but a black hole in Einstein’s theoryofgravity. This is because information of such a particle is hidden inside the horizon and is lost, as mentioned in Chap.  1 . In contrast, the asymptotically background-free quantum gravity suggests that there exists a localized excited stateExcited state of quantum gravity with mass exceeding the Planck mass, which has the size of the correlation length, has no singularity, and looks like a particle from the outside.