The UNM Physics and Astronomy Department will host the next colloquia for its Spring 2011 series Friday, Jan. 28 at 4 p.m. in Dane Smith Hall, room 125. Titled, "Black holes, dark energy, and gravitational condensate stars," the colloquia will feature Dr. Emil Mottola from Los Alamos National Laboratory.

Both the black hole information paradox and the existence of vacuum dark energy indicate that something basic is missing in the gravitational sector of the Standard Model at macroscopic distance scales. After a brief introduction to and review of the present status of these problems, a possible resolution which relates the two will be presented.

The completely non-singular quantum final state of gravitational collapse in which the classical black hole event horizon is replaced by a thin shell, and its interior is replaced by a vacuum condensate with the dark energy eq. of the state solves all information paradoxes. Gravitational condensate stars have a modest entropy and are viable candidates for astrophysical objects now assumed to be black holes. In cosmology, these same considerations suggest that dark energy may be a finite volume Casimir effect of the Hubble scale.

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