3 papers
gr-qc1997
Covariant path integrals and black holes
F. Vendrell, M. E. Ortiz
The thermal nature of the propagator in a collapsed black-hole spacetime is shown to follow from the non-trivial topology of the configuration space in tortoise coordinates by usin…
hep-th1994
Black holes, the Wheeler-DeWitt equation and the semi-classical approximation
Miguel E. Ortiz
The definition of matter states on spacelike hypersurfaces of a 1+1 dimensional black hole spacetime is considered. Because of small quantum fluctuations in the mass of the black h…
gr-qc1994
Bosonic physical states in N=1 supergravity?
S. M. Carroll, D. Z. Freedman, M. E. Ortiz +1
It is argued that states in supergravity that solve all of the constraint equations cannot be bosonic in the sense of being independent of the fermionic degrees of freedom. (…