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Signature of the Simplicial Supermetric
James B. Hartle, Warner A. Miller, Ruth M. Williams
We investigate the signature of the Lund-Regge metric on spaces of simplicial three-geometries which are important in some formulations of quantum gravity. Tetrahedra can be joined…
Solutions of the Regge Equations on some Triangulations of CP^2
James B. Hartle, Zoltan Perjes
Simplicial geometries are collections of simplices making up a manifold together with an assignment of lengths to the edges that define a metric on that manifold. The simplicial an…
Nearly Instantaneous Alternatives in Quantum Mechanics
Richard J. Micanek, James B. Hartle
Usual quantum mechanics predicts probabilities for the outcomes of measurements carried out at definite moments of time. However, realistic measurements do not take place in an ins…
Scientific Knowledge from the Perspective of Quantum Cosmology
James B. Hartle
Existing physical theories do not predict every feature of our experience but only certain regularities of that experience. That difference between what could be observed and what…