منابع مشابه
The M(atrix) Model of M-theory
These lecture notes give a pedagogical and (mostly) self-contained review of some basic aspects of the Matrix model of M-theory. The derivations of the model as a regu-larized supermembrane theory and as the discrete light-cone quantization of M-theory are presented. The construction of M-theory objects from matrices is described, and gravitational interactions between these objects are derived...
متن کاملCoupling of M–branes in M–theory
Coupling of a membrane and a five-brane to the bosonic sector of D = 11 supergravity is considered. The five–brane is a dyonic object which carries both an electric and a magnetic charge of the D = 11 three-form gauge field A, and it couples not only to A but also minimally couples to a six-form field A dual to A. This implies that the 5-brane should more naturally couple to a version of D = 11...
متن کاملCompactifications of M-theory
We discuss Poincaré three-brane solutions in D = 5 M-Theory compactifications on Calabi-Yau (CY) threefolds with G-fluxes. We show that the vector moduli freeze at an attractor point. In the case with background flux only, the spacetime geometry contains a zero volume singularity with the three-brane and the CY space shrinking simultaneously to a point. This problem can be avoided by including ...
متن کاملVacua of M-theory and String Theory
We argue that supersymmetric higher-dimension operators in the effective actions of M-theory and IIB string theory do not affect the maximally supersymmetric vacua: adS4 × S 7 and adS7 × S 4 in Mtheory and adS5 × S 5 in IIB string theory. All these vacua are described in superspace by a fixed point with all components of supertorsion and supercurvature being supercovariantly constant. This foll...
متن کاملUnderstanding Hydrogen Adsorption in MIL-47-M (M = V and Fe) through Density Functional Theory
The present paper aims to investigate the role of open metal site metal-organic frameworks (MOFs) on hydrogen adsorptivity using periodic boundary condition (PBC) density functional theory (DFT). Hence, MIL-47-M (M = V and Fe) were selected and one hydrogen molecule adsorptivity was calculated in different orientations on them. Four different chemical sites were identified in every cluster sect...
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ژورنال
عنوان ژورنال: Nature
سال: 1891
ISSN: 0028-0836,1476-4687
DOI: 10.1038/044348a0