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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…
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. (…