Results 61 to 70 of about 86,735 (216)
On the Geometric Approach to the Boundary Problem in Supergravity
Universe, 2021 We review the geometric superspace approach to the boundary problem in supergravity, retracing the geometric construction of four-dimensional supergravity Lagrangians in the presence of a non-trivial boundary of spacetime.
Laura Andrianopoli, Lucrezia Ravera
doaj +1 more source
Consistent 4-form fluxes for maximal supergravity [PDF]
, 2015 We derive new ansaetze for the 4-form field strength of D=11 supergravity corresponding to uplifts of four-dimensional maximal gauged supergravity. In particular, the ansaetze directly yield the components of the 4-form field strength in terms of the ...
Godazgar, Hadi +3 more
core +2 more sources
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
$$dS_5$$ dS5 vacua from matter-coupled 5D $$N=4$$ N=4 gauged supergravity
European Physical Journal C: Particles and Fields, 2019 We study $$dS_5$$ dS5 vacua within matter-coupled $$N=4$$ N=4 gauged supergravity in five dimensions using the embedding tensor formalism. With a simple ansatz for solving the extremization and positivity of the scalar potential, we derive a set of ...
H. L. Dao, Parinya Karndumri
doaj +1 more source
Enhanced Separation Behavior of Metals from Simulated Printed Circuit Boards by Supergravity
Metals, 2022 Printed circuit boards (PCBs) contain valuable metals, epoxy resin, and glass fiber, resulting in them being considered as attractive secondary sources of metals.
Long Meng, Yudong Liu, Zhancheng Guo
doaj +1 more source
D=7 SU(2) Gauged Supergravity From D=10 Supergravity [PDF]
Phys.Lett. B476 (2000) 415-419, 1999 The theory of SU(2) gauged seven-dimensional supergravity is obtained by compactifying ten dimensional N=1 supergravity on the group manifold SU(2).
arxiv +1 more source
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
Supersymmetric $$AdS_5$$ AdS5 black holes and strings from 5D $$N=4$$ N=4 gauged supergravity
European Physical Journal C: Particles and Fields, 2019 We study supersymmetric $$AdS_3\times \Sigma _2$$ AdS3×Σ2 and $$AdS_2\times \Sigma _3$$ AdS2×Σ3 solutions, with $$\Sigma _2=S^2,H^2$$ Σ2=S2,H2 and $$\Sigma _3=S^3,H^3$$ Σ3=S3,H3 , in five-dimensional $$N=4$$ N=4 gauged supergravity coupled to five vector
H. L. Dao, Parinya Karndumri
doaj +1 more source
Multi-Field versus Single-Field in the Supergravity Models of Inflation and Primordial Black Holes
Universe, 2021 We review the models unifying inflation and Primordial Black Hole (PBH) formation, which are based on the modified (Starobinsky-type) supergravity. We begin with the basic (Starobinsky) inflationary model of modified gravity and its alpha-attractor-type ...
Sergei V. Ketov
doaj +1 more source
Toward Supergravity Spectral Action
, 2013 A spectral action of Euclidean supergravity is proposed. We calculate up to $a_4$, the Seeley-Dewitt coefficients in the expansion of the spectral action associated to the supergravity Dirac operator.
Ciuhu C. +4 more
core +1 more source