Classicality, Matter-Antimatter Asymmetry, and Quantum-Gravity Deformed Uncertainty Relations

Abstract

Some of the recent work on quantum gravity has involved modified uncertainty relations such that the products of the uncertainties of certain pairs of observables increase with time. It is here observed that this type of modified uncertainty relations would lead to quantum decoherence, which could explain the classical behavior of macroscopic systems, and CPT violation, which coud provide the seed for the emergence of a matter-antimatter asymmetry.

7 pages, LaTex. Accepted for publication in Modern Physics Letters A. This essay received ``honorable mention'' at the 1997 Gravity Research Foundation Essay Competition

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