Cosmology with nilpotent superfields
By Sergio Ferrara, R. Kallosh, Andrei Linde. 2014
268 citations recorded by the source corpus.
A bstractWe discuss N=1 supergravity inflationary models based on two chiral multi-plets, the inflaton and the goldstino superfield. Using superconformal methods for these models, we propose to replace the unconstrained chiral goldstino multiplet by the nilpotent one associated with non-linearly realized supersymmetry of the Volkov-Akulov type. In the new cosmological models, the sgoldstino is proportional to a bilinear combination of fermionic goldstinos. It does not acquire any vev, does nor require stabilization, and does not affect the cosmological evolution. We explain a universal relation of these new models to κ-symmetric super-Dp-brane actions. This modification significantly simplifies a broad class of the presently existing inflationary models based on supergravity and string theory, including the simplest versions of chaotic inflation, the Starobinsky model, a broad class of cosmological attractors, the Higgs inflation, and much more. In particular, this is a step towards a fully supersymmetric version of the string theory axion monodromy inflation. The new construction serves as a simple and manifestly supersymmetric uplifting tool in the KKLT-type string theory landscape.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/16e67432d3572ee9b3dadd8c11ffa29a2177345b
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Citations in the corpus
- Uplifting Runaways (2018, background): “A related construction, in which a single antibrane is placed on top of an orientifold three-plane, has also been argued to give an uplift mechanism [12], and at the same time to be describable using a nilpotent supergravity action [13,14].”
- D3¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \overline{\mathrm{D}3} $$\end{document} and dS (2015, unknown): “1) can be extended to a supergravity version of the KKLT-type model [1,38], proposed in [22], which in addition to the volume modulus involves the nilpotent superfield S.”
- Pure de Sitter supergravity (2015, methodology): “The superconformal approach to pure de Sitter supergravity suggested in [13] is the following: The model at the superconformal level contains the chiral compensatingmultiplet fX0;χ0;F0g; a chiral Goldstino multiplet fX1;χ1;F1g; and a Lagrange multiplier multiplet fΛ; χΛ; FΛg, interacting with the We”
- Inflation and uplifting with nilpotent superfields (2014, methodology): “For a very large class of models mentioned in [4], the upshot is very simple: Inflationary models with unconstrained chiral superfields stabilized at S(x, θ)|θ=0 = s(x) = 0, will continue working in exactly the same way if S is a nilpotent superfield, but without any need to stabilize the scalar par”
- On sgoldstino-less supergravity models of inflation (2014, methodology): “A thorough study of supergravity models for inflation with a nilpotent goldstino multiplet and an unconstrained inflaton multiplet has been performed by Ferrara, Kallosh and Linde in [19].”
- Emergence of spontaneously broken supersymmetry on an anti-D3-brane in KKLT dS vacua (2014, background): “In [7, 8] we referred to the well known argument [20, 23] that a Dp-brane action, when gauge-fixed in a certain gauge, always leads to a DBI term which has Volkov-Akulov fermions on its world volume.”
- Exploring cosmic origins with CORE: Inflation (2016, background): “Non-linear realizations offer a number of phenomenological simplifications, such as the absence of possibly tachyonic directions [87].”