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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…
gr-qc2002★ 1 cited
Non-unitary HD gravity classically equivalent to Einstein gravity
Sergio De Filippo
Runaway solutions can be avoided in fourth order gravity by a doubling of the matter operator algebra with a symmetry constraint with respect to the exchange of observable and hidd…