Decoherence-Induced Violations of Einstein Equivalence Principle

Abstract

In this essay it will be shown that Decoherence Model and Einstein Equivalence Principle are conceptually incompatible. In other words, assuming only the validity of the Weak Equivalence Principle the present work concludes that we face two possibilities: (i) if Decoherence Model provides a correct description of nature at quantum level, then there are systems which violate Local Position Invariance, or, (ii) if all the postulates behind Einstein Equivalence Principle are valid, even on quantum realm, then Decoherence Model breaks down in curved spacetimes. Finally, the present results are confronted against Schiff's conjecture. * email: acamacho@nuclear.inin.mx † This essay received an "honorable mention" in the 2001 Essay Competition of the Gravity Research Foundation-Ed.

Quantum-Spacetime Phenomenology

“…Examples are the study reported in Ref. [168], which obtained violations of the Equivalence Principle from quantum-spacetime-induced decoherence, the study based on noncritical Liouville String Theory reported in Ref. [169], and the study based on metric flluctuations reported in Ref.…”