منابع مشابه
Gravitons and loops.
The recently proposed loop representation is used to quantize linearized general relativity. The Fock space of graviton states and its associated algebra of observables are represented in terms of functionals of loops. The “reality conditions” are realized by an inner product that is chiral asymmetric, resulting in a chiral asymmetric ordering for the Hamiltonian, and, in an asymmetric descript...
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Gravitons in a squeezed vacuum state, the natural result of quantum creation in the early universe or by black holes, will introduce metric fluctuations. These metric fluctuations will introduce fluctuations of the lightcone. It is shown that when the various two-point functions of a quantized field are averaged over the metric fluctuations, the lightcone singularity disappears for distinct poi...
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A short review of the problems with the action for massive gravitons is presented. We show that consistency problems could be resolved by employing spontaneous symmetry breaking to give masses to gravitons. The idea is then generalized by enlarging the SL(2,C) symmetry to SL(2N,C)× SL(2N,C) which is broken to SL(2,C) spontaneously through a non-linear realization. The requirement that the space...
متن کاملNon-Abelian Giant Gravitons
We argue that the giant graviton configurations known from the literature have a complementary, microscopical description in terms of multiple gravitational waves undergoing a dielectric (or magnetic moment) effect. We present a non-Abelian effective action for these gravitational waves with dielectric couplings and show that stable dielectric solutions exist. These solutions agree in the large...
متن کاملGiant Gravitons, BPS bounds and Noncommutativity
It has been recently suggested that gravitons moving in AdS m × S n spacetimes along the S n blow up into spherical (n−2) branes whose radius increases with increasing angular momentum. This leads to an upper bound on the angular momentum, thus " explaining " the stringy exclusion principle. We show that this bound is present only for states which saturate a BPS-like condition involving the ene...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1991
ISSN: 0556-2821
DOI: 10.1103/physrevd.44.1740