Review: Gas of Wormholes: A Possible Ground State of Quantum Gravity |
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Authors: | G Preparata S Rovelli S-S Xue |
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Institution: | (1) Dipartimento di Fisica dell', Università and INFN—sezione di Milano, Via Celoria 16, Milan, Italy;(2) I.C.R.A.—International Center of Relativistic Astrophysics, La Sapienza, 00185 Rome, Italy |
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Abstract: | In order to gain insight into the possible Ground State of Quantized Einstein's Gravity, we have derived a variational calculation of the energy of the quantum gravitational field in an open space, as measured by an asymptotic observer living in an asymptotically flat space-time. We find that for Quantum Gravity (QG) it is energetically favourable to perform its quantum fluctuations not upon flat space-time but around a "gas" of wormholes of mass m
p, the Planck mass (m
p 1019 GeV) and average distance l
p, the Planck length a
p(a
p 10–33 cm). As a result, assuming such configuration to be a good approximation to the true Ground State of Quantum Gravity, space-time, the arena of physical reality, turns out to be well described by Wheeler's quantum foam and adequately modeled by a space-time lattice with lattice constant l
p, the Planck lattice. |
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Keywords: | Space-time lattice |
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