DECOHERENCE-INDUCED VIOLATIONS OF EINSTEIN EQUIVALENCE PRINCIPLE

Decoherence–induced violations of Einstein equivalence principle

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 Invar...

Runaway dilaton and equivalence principle violations.

In a recently proposed scenario, where the dilaton decouples while cosmologically attracted towards infinite bare string coupling, its residual interactions can be related to the amplitude of density fluctuations generated during inflation, and are large enough to be detectable through a modest improvement on present tests of free-fall universality. Provided it has significant couplings to eith...

Equivalence 5 What was Einstein ' s principle of Equivalence ?

Violations of the equivalence principle in a dilaton - runaway scenario

We explore a version of the cosmological dilaton-fixing and decoupling mechanism in which the dilaton dependence of the low-energy effective action is extremized for infinitely large values of the bare string coupling gs 5ef. We study the efficiency with which the dilaton f runs away toward its ‘‘fixed point’’ at infinity during a primordial inflationary stage, and thereby approximately decoupl...

Universal Decoherence under Gravity: A Perspective through the Equivalence Principle.

Pikovski et al. [Nat. Phys. 11, 668 (2015)] show that a composite particle prepared in a pure initial quantum state and propagated in a uniform gravitational field undergoes a decoherence process at a rate determined by the gravitational acceleration. By assuming Einstein's equivalence principle to be valid, we analyze a physical realization of the (1+1)D thought experiment of Pikovski et al. t...