Impacto
Downloads
Downloads per month over past year
Garay Elizondo, Luis Javier (1999) Quantum evolution in spacetime foam. International journal of modern physics A, 14 (26). pp. 40794120. ISSN 0217751X

PDF
452kB 
Official URL: http://dx.doi.org/10.1142/S0217751X99001913
URL  URL Type 

http://arxiv.org  Publisher 
http://arxivweb2.library.cornell.edu/pdf/grqc/9911002.pdf  Organisation 
Abstract
In this work, I review some aspects concerning the evolution of quantum lowenergy fields in a foamlike spacetime, with involved topology at the Planck scale but with a smooth metric structure at large length scales, as follows. Quantum gravitational fluctuations may induce a minimum length thus introducing an additional source of uncertainty in physics. The existence of this resolution limit casts doubts on the metric structure of spacetime at the Planck scale and opens a doorway to nontrivial topologies, which may dominate Planck scale physics. This foamlike structure of spacetime may show up in lowenergy physics through loss of quantum coherence and modedependent energy shifts, for instance, which might be observable. Spacetime foam introduces nonlocal interactions that can be modeled by a quantum bath, and lowenergy fields evolve according to a master equation that displays such effects. Similar laws are also obtained for quantum mechanical systems evolving according to good real clocks, although the underlying Hamiltonian structure in this case establishes serious differences among both scenarios.
Item Type:  Article 

Additional Information:  I am grateful to C. Barceló and P.F. GonzálezDíaz for helpful discussions and reading the manusscript. I was supported by funds provided by DGICYT and MEC (Spain) under Projects PB93–0139, PB94–0107, and PB97–1218. 
Uncontrolled Keywords:  Chronology protection conjecture; Action uncertainty principle; DeSitter wormholes; Virtual blackholes; Cosmological constant; Baby universes; Generalrelativity; Particle creation; Giant wormholes; Topology change 
Subjects:  Sciences > Physics > PhysicsMathematical models Sciences > Physics > Mathematical physics 
ID Code:  29931 
Deposited On:  07 May 2015 10:31 
Last Modified:  10 Dec 2018 15:10 
Origin of downloads
Repository Staff Only: item control page