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gr-qc1998★ 13 cited
Stability Issues in Euclidean Quantum Gravity
G. Modanese
It is known that the action of Euclidean Einstein gravity is not bounded from below and that the metric of flat space does not correspond to a minimum of the action. Nevertheless,…
math-ph1998
"Tunneling" Amplitudes of a Massless Quantum Field
Giovanni Modanese
We propose a method for the approximate computation of the Green function of a scalar massless field subjected to potential barriers of given size and shape in spacetime. The poten…