✎ past_projects [Jesse Thaler]

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====== Black Hole Formation ======

//Spring 2002//

The dynamics of black hole formation is one of the unsolved problems of modern physics.  This owes to both the unsolvability of two-body problems in Einstein's theory of General Relativity and the auantum nature of certain black hole processes.  With [[http://www.physics.brown.edu/Users/faculty/jevicki/jevicki.htm|Antal Jevicki]], I examined an exactly solvable model of black hole formation in 2 + 1 dimensions in order to predict qualitative features of black hole formation in higher dimensional spaces.

In particular, we found no exponential supression or enhancement of the process.  This is different from the result predicted by models that assume a test particle falling in an effective black hole background.  We believe the reason for the difference is that the total energy of the system is the mass of the created black hole, so models that assume a small mass test particle ignore the fact that the test mass kinetic energy must contribute to the mass of the black hole.  This changes the diverege of the momentum near the effective horizon from a linear to a logarthymic diverges, so the classical action is finite as opposed to infinite, therefore the semi-classical transition amplitude does not have an exponential suppression.

I was an [[http://www.aps.org/praw/apker/index.html|APS Apker Award]] finalist for this research.

  * **Dynamics of black hole formation in an exactly solvable model**.\\ Antal Jevicki and Jesse Thaler.\\  [[http://link.aps.org/abstract/PRD/v66/e024041|Phys. Rev. D66 024041]], [[http://www.arXiv.org/abs/hep-th/0203172|hep-th/0203172]].