3 papers
gr-qc2004
A class of nonunitary models of Newtonian gravity and its unicity
Sergio De Filippo, Filippo Maimone
A class of non-Markoffian nonunitary models for Newtonian gravity is characterized as following from some rather natural hypotheses. One of such models was previously obtained as t…
gr-qc2002
Nonunitary Newtonian Gravity
Filippo Maimone, Sergio De Filippo
It is shown that the Newtonian limit of a stable realization of HD gravity leads to a sharp transition, around 10^{11} proton masses, from the wavelike properties of microscopic pa…
gr-qc2002
Nonunitary Classically Stable HD Gravity
Sergio De Filippo, Filippo Maimone
Classical instability in fourth order gravity is cured at the expense of unitarity. The appearance of hidden degrees of freedom replicating those of ordinary matter allows for ordi…