Rolling G 2 Moduli
نویسنده
چکیده
We study the time evolution of freely rolling moduli in the context of M-theory on a G2 manifold. This free evolution approximates the correct dynamics of the system at sufficiently large values of the moduli when effects from non-perturbative potentials and flux are negligible. Moduli fall into two classes, namely bulk moduli and blow-up moduli. We obtain a number of non-trivial solutions for the time-evolution of these moduli. As a generic feature, we find the blow-up moduli always expand asymptotically at early and late time. email: [email protected] email: [email protected]
منابع مشابه
Strong Coupling Dynamics of the Higgs Branch: Rolling a Higgs by Collapsing an Instanton
We construct the dual supergravity description of strongly coupled, large N , eightsupercharge gauge theories with fundamental hypermultiplets at points on the mixed CoulombHiggs branch. With certain assumptions about unknown couplings of D-branes to supergravity, this construction gives the correct metric on the hypermultiplet (Higgs-branch) component the moduli space, which decouples from the...
متن کاملA THEORETICAL STUDY OF ZEOLITE ABW: ITS MECHANICAL AND AUXETIC PROPERTIES.
Atomistic simulations are carried out for zeolite with ABW framework. The structure is modeled and force field simulations are preformed to investigate its elastic properties, bulk, shear modulus and auxeticity. Bulk moduli (Ks), Shear moduli (G), and Poissons ratios (ν) were found to be Ks=79.71725 GPa, G=16.93265 GPa, νxy = -0.2207, νxz= -0.5730, νyx= -0.71717, νyz=0.87013, νzx= -0.33097 and ...
متن کاملHybrid Inflation in Intersecting Brane Worlds
Non-supersymmetric brane world scenarios in string theory display perturbative instabilities that usually involve run-away potentials for scalar moduli fields. We investigate in the framework of intersecting brane worlds whether the leading order scalar potential for the closed string moduli allows to satisfy the slow-rolling conditions required for applications in inflationary cosmology. Adopt...
متن کاملBeauty is Attractive: Moduli Trapping at Enhanced Symmetry Points
We study quantum effects on moduli dynamics arising from the production of particles which are light at points of enhanced symmetry in moduli space. The resulting forces trap the moduli at these points. Moduli trapping occurs in time-dependent quantum field theory, as well as in systems of moving D-branes, where it leads the branes to combine into stacks. Trapping also occurs in the presence of...
متن کاملar X iv : h ep - p h / 04 02 07 5 v 1 9 F eb 2 00 4 Quintessence and Varying α from Shape
In extra-dimensional models which are compactified on an n-torus (n ≥ 2) there exist moduli associated with the torus volume (which sets the fundamental Planck scale), the ratios of the torus radii, and the angle(s) of periodicity. We consider a model with gravity in the bulk of n = 2 large extra dimensions with a fixed volume, taking all Standard Model fields to be confined to a “thick” and su...
متن کامل