Results 111 to 120 of about 75,191 (246)
de Sitter State in Heterotic String Theory
Fortschritte der Physik, Volume 72, Issue 11, November 2024.Abstract Recent no‐go theorems have ruled out four‐dimensional classical de Sitter vacua in heterotic string theory. On the other hand, the absence of a well‐defined Wilsonian effective action and other related phenomena also appear to rule out such time‐dependent vacua with de Sitter isometries, even in the presence of quantum corrections.
Stephon Alexander +4 more
wiley +1 more source
Entropy, 2008 The general solutions of the radial attractor flow equations for extremal black holes, both for non-BPS with non-vanishing central charge Z and for Z = 0, are obtained for the so-called stu model, the minimal rank-3 N = 2 symmetric supergravity in d = 4 ...
Armen Yeranyan +3 more
doaj +1 more source
On the Starobinsky Model of Inflation from Supergravity
, 2013 We discuss how the higher-derivative Starobinsky model of inflation originates from N=1 supergravity. It is known that, in the old-minimal supergravity description written by employing a chiral compensator in the superconformal framework, the Starobinsky
Farakos, F., Kehagias, A., Riotto, A.
core +1 more source
Five-dimensional Superfield Supergravity [PDF]
, 2001 We present a projective superspace formulation for matter-coupled simple supergravity in five dimensions. Our starting point is the superspace realization for the minimal supergravity multiplet proposed by Howe in 1981.
Chate, H. +3 more
core +3 more sources
Recent and new results on octonionic Bergman and Szegö kernels
Mathematical Methods in the Applied Sciences, Volume 47, Issue 10, Page 7888-7901, 15 July 2024.Very recently one has started to study Bergman and Szegö kernels in the setting of octonionic monogenic functions. In particular, explicit formulas for the Bergman kernel for the octonionic unit ball and for the octonionic right half‐space as well as a formula for the Szegö kernel for the octonionic unit ball have been established.
Rolf Sören Kraußhar
wiley +1 more source
Supergravity and cosmology [PDF]
Proceedings of 2nd World Summit: Exploring the Dark Side of the Universe — PoS(EDSU2018), 2001 For cosmology we need General Relativity. Supergravity is the next natural step after General Relativity. Superstring theory is believed to be the most fundamental theory we know. However, string theory has an emergent concept of space-time. To use it in the context of the 4-dimensional General Relativity and cosmology requires many intermediate steps.
openaire +3 more sources
Structure of linearized supergravity and conformal supergravity [PDF]
Nuclear Physics B, 1978 Abstract We give, at the linearized level, the supersymmetric generalization of various tensors of differential geometry, such as the metric tensor and the Riemann, Einstein and Weyl tensors. Using them we write the Lagrangian and the equations of motion of linearized supergravity and conformal supergravity with coupling to sources. Both theories are
Bruno Zumino, Sergio Ferrara
openaire +2 more sources
Supersymmetric $$AdS_6$$ A d S 6 black holes from ISO(3) $$\times $$ × U(1) F(4) gauged supergravity
European Physical Journal C: Particles and FieldsWe study supersymmetric $$AdS_6$$ A d S 6 black holes from matter-coupled F(4) gauged supergravity coupled to four vector multiplets with $$ISO(3)\times U(1)$$ I S O ( 3 ) × U ( 1 ) gauge group. This gauged supergravity admits a maximally supersymmetric $
Parinya Karndumri
doaj +1 more source
Supersymmetric M-brane Solution in a Dynamical Background
Galaxies, 2018 Supersymmetry arises in certain theories of fermions coupled to gauge fields and gravity in a spacetime of 11 dimensions. The dynamical brane background has mainly been studied for the class of purely bosonic solutions only, but recent developments ...
Kengo Maeda, Kunihito Uzawa
doaj +1 more source
Recycling of iron and steel slag for carbon reduction and low‐environment load application
Carbon Neutralization, Volume 3, Issue 4, Page 606-628, July 2024.This article reviews the coupling of the research progress of blast furnace slag and steel slag in glass‐ceramics, ceramic products, mineral wool, and cementitious in recent years. The research status of CO2 fixation by iron and steel slag was discussed.
Ying Xu +4 more
wiley +1 more source