Clock Time and Entropy

Abstract

Testable conditional probabilities appear to be restricted to single hypersurfaces (marvelous moments) and depend only on stationary observables. Observable evolution, such as a change of entropy, should be expressed as a dependence upon clock time, not upon inaccessible coordinate time.

14 pages, plain TeX, report Alberta-Thy-12-93, To be published in {\it Physical Origins of Time Asymmetry,} Eds. J. J. Halliwell, J. Perez-Mercader, and W. H. Żurek, Cambridge University Press, Cambridge (1993)