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20 papers · 2 filters
The Ghost Condensate in N=1 Supergravity
Michael Koehn, Jean-Luc Lehners, Burt Ovrut
We present the theory of a supersymmetric ghost condensate coupled to N=1 supergravity. This is accomplished using a general formalism for constructing locally supersymmetric highe…
Harmonic R-matrices for Scattering Amplitudes and Spectral Regularization
Livia Ferro, Tomasz Lukowski, Carlo Meneghelli +2
Planar N=4 super Yang-Mills appears to be integrable. While this allows to find this theory's exact spectrum, integrability has hitherto been of no direct use for scattering amplit…
Introduction to multifractional spacetimes
Gianluca Calcagni
We informally review the construction of spacetime geometries with multifractal and, more generally, multiscale properties. Based on fractional calculus, these continuous spacetime…
Recent Developments in (0,2) Mirror Symmetry
Ilarion V. Melnikov, Savdeep Sethi, Eric Sharpe
Mirror symmetry of the type II string has a beautiful generalization to the heterotic string. This generalization, known as (0,2) mirror symmetry, is a field still largely in its i…
Effective field theory of weakly coupled inflationary models
Rhiannon Gwyn, Gonzalo A. Palma, Mairi Sakellariadou +1
The application of Effective Field Theory (EFT) methods to inflation has taken a central role in our current understanding of the very early universe. The EFT perspective has been…
DBI Inflation in N=1 Supergravity
Michael Koehn, Jean-Luc Lehners, Burt A. Ovrut
It was recently demonstrated that, when coupled to N=1 supergravity, the Dirac-Born-Infeld (DBI) action constructed from a single chiral superfield has the property that when the h…