Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-05-23
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
28 pages LaTeX, 5 eps figures, talk presented by DVN at 4th International Symposium On Sources And Detection Of Dark Matter In
Scientific paper
Classical superstring vacua have zero vacuum energy and are supersymmetric and Lorentz-invariant. We argue that all these properties may be destroyed when quantum aspects of the interactions between particles and non-perturbative vacuum fluctuations are considered. A toy calculation of string/D-brane interactions using a world-sheet approach indicates that quantum recoil effects - reflecting the gravitational back-reaction on space-time foam due to the propagation of energetic particles - induce non-zero vacuum energy that is linked to supersymmetry breaking and breaks Lorentz invariance. This model of space-time foam also suggests the appearance of microscopic event horizons.
Ellis John
Mavromatos Nick E.
Nanopoulos Dimitri V.
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