Results 81 to 90 of about 1,045,565 (257)
Generalized IIB supergravity from exceptional field theory [PDF]
The background underlying the $\eta$-deformed $AdS_5\times S^5$ sigma-model is known to satisfy a generalization of the IIB supergravity equations. Their solutions are related by T-duality to solutions of type IIA supergravity with non-isometric linear dilaton.
arxiv +1 more source
Supersymmetry and supergravity models
In this paper a review of the present status of supersymmetric (SUSY) and supergravity (SUGRA) models is presented, emphasizing the ambiguities one encounters in constructing a SUSY or SUGRA version of the standard model.
openaire +3 more sources
Constrained superfields in Supergravity [PDF]
We analyze constrained superfields in supergravity. We investigate the consistency and solve all known constraints, presenting a new class that may have interesting applications in the construction of inflationary models.
Dall'Agata, Gianguido, Farakos, Fotis
core +2 more sources
We propose a novel class of $\mathcal{N}=1$ supergravity (called ``Relaxed supergravity'') that can enlarge the space of scalar potentials, relaxing the strongly-constrained form of the prototype supergravity potential. It has very long been considered that in $\mathcal{N}=1$ supergravity a negative term of scalar potential can be given only by the ...
arxiv
Symplectic Deformations of Gauged Maximal Supergravity [PDF]
We identify the space of symplectic deformations of maximal gauged supergravity theories. Coordinates of such space parametrize inequivalent supergravity models with the same gauge group.
Dall'Agata, Gianguido+2 more
core +1 more source
Phenomenological Aspects of Heterotic Orbifold Models at One Loop
We provide a detailed study of the phenomenology of orbifold compactifications of the heterotic string within the context of supergravity effective theories.
148+69 more
core +4 more sources
Supergravity solution-generating techniques and canonical transformations of σ-models from O(D, D)
Within the framework of the flux formulation of Double Field Theory (DFT) we employ a generalised Scherk-Schwarz ansatz and discuss the classification of the twists that in the presence of the strong constraint give rise to constant generalised fluxes ...
Riccardo Borsato, Sibylle Driezen
doaj +1 more source
Energy conditions in Starobinsky supergravity [PDF]
We consider the classical energy conditions (strong, null and weak) in Starobinsky supergravity theories. We study in detail the simplest Starobinsky supergravity model in the "old-minimal" supergravity setup and find examples of violations of each energy condition for a certain range of the parameters due to extra scalar d.o.f. present in supergravity.
arxiv +1 more source
Quintessence with two energy scales [PDF]
We study quintessence models using low energy supergravity inspired from string theory. We consider effective supergravity with two scales m_S, the string scale, and m_PL, the Planck scale and show that quintessence naturally arises from a supersymmetry ...
A. Balbi+41 more
core +2 more sources
This review focuses on the electrochemical synthesis of MnO2 materials and their composites and their application as electrocatalysts for OER and HER reactions for the conversion of renewable energy into chemical fuels. The electrocatalytic function of electrodeposited MnO2 for ORR and bifunctional ORR/OER for efficient operation of fuel cells and ...
Masaharu Nakayama, Wataru Yoshida
wiley +1 more source