4 papers
Background-Independent Gravitational Waves
Juri Agresti, Roberto De Pietri, Luca Lusanna +1
A Hamiltonian linearization of the rest-frame instant form of tetrad gravity (gr-qc/0302084), where the Hamiltonian is the weak ADM energy , in a completely fixed (…
Matrix elements of the plaquette operator of Lattice Gauge Theory
G. Burgio, R. De Pietri, H. A. Morales-Tecotl +2
We show that in the spin-network basis it is possible to compute the matrix elements of any given operator of the Hamiltonian formulation of Lattice Gauge Theory (LGT). We give the…
Tetrad Gravity: III) Asymptotic Poincare' Charges, the Physical Hamiltonian and Void Spacetimes
Luca Lusanna, Roberto de Pietri
A discussion of asymptotic weak and strong Poincare' charges in metric gravity is given to identify the proper Hamiltonian boundary conditions. The asymptotic part of the lapse and…
The Equivalence between the Connection and the Loop Representation of Quantum Gravity
Roberto De Pietri
The recent developments of the ``connection'' and ``loop'' representations have given the possibility to show that the two representation are equivalent and that it is possible to…