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5 papers · 2 filters
Black hole thermodynamics from quantum gravity
Gilad Lifschytz, Miguel E. Ortiz
The semiclassical approximation is studied on hypersurfaces approaching the union of future null infinity and the event horizon on a large class of four dimensional black hole back…
Spin/disorder correlations and duality in the c=1/2 string
Sean M. Carroll, Miguel E. Ortiz, Washington Taylor
We use the method of discrete loop equations to calculate exact correlation functions of spin and disorder operators on the sphere and on the boundary of a disk in the st…
A geometric approach to free variable loop equations in discretized theories of 2D gravity
Sean M. Carroll, Miguel E. Ortiz, Washington Taylor
We present a self-contained analysis of theories of discrete 2D gravity coupled to matter, using geometric methods to derive equations for generating functions in terms of free (no…
Quantum gravity effects at a black hole horizon
Gilad Lifschytz, Miguel E. Ortiz
Quantum fluctuations in the background geometry of a black hole are shown to affect the propagation of matter states falling into the black hole in a foliation that corresponds to…
String Theory and Inflation
Thibault Damour, Alexander Vilenkin
String theory abounds with light scalar fields (the dilaton and various moduli) which create a host of observational problems, and notably some serious cosmological difficulties si…