Thermodynamic positivity of black hole entropy yields a new constraint on higher-derivative 3-form couplings, which in turn restricts viable 3-form inflation models.
Membranes and Three-form Supergravity
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abstract
We discuss membranes in four-dimensional N=1 superspace. The kappa-invariance of the Green-Schwarz action implies that there is a dual version of N=1 supergravity with a three-form potential. We formulate this new supergravity in terms of a three-form superfield in curved superspace, giving the relevant constraints on the field strength. We find the corresponding membrane soliton in the new supergravity and discuss how the extended supersymmetry algebra emerges from the symmetries of the flat superspace background.
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A Thermodynamic Positivity Bound on Higher-Derivative 3-Form Couplings in de Sitter, and its Inflationary Consequences
Thermodynamic positivity of black hole entropy yields a new constraint on higher-derivative 3-form couplings, which in turn restricts viable 3-form inflation models.