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28 papers · 2 filters
2d affine XY-spin model/ 4d gauge theory duality and deconfinement
Mohamed M. Anber, Erich Poppitz, Mithat Unsal
We introduce a duality between two-dimensional XY-spin models with symmetry-breaking perturbations and certain four-dimensional SU(2)and SU(2)/Z_2 gauge theories, compactified on a…
Unitarity and the Holographic S-Matrix
A. Liam Fitzpatrick, Jared Kaplan
The bulk S-Matrix can be given a non-perturbative definition in terms of the flat space limit of AdS/CFT. We show that the unitarity of the S-Matrix, ie the optical theorem, can be…
Universality of the Volume Bound in Slow-Roll Eternal Inflation
Sergei Dubovsky, Leonardo Senatore, Giovanni Villadoro
It has recently been shown that in single field slow-roll inflation the total volume cannot grow by a factor larger than e^(S_dS/2) without becoming infinite. The bound is saturate…
Analyticity and the Holographic S-Matrix
A. Liam Fitzpatrick, Jared Kaplan
We derive a simple relation between the Mellin amplitude for AdS/CFT correlation functions and the bulk S-Matrix in the flat spacetime limit, proving a conjecture of Penedones. As…
(Small) Resonant non-Gaussianities: Signatures of a Discrete Shift Symmetry in the Effective Field Theory of Inflation
Siavosh R. Behbahani, Anatoly Dymarsky, Mehrdad Mirbabayi +1
We apply the Effective Field Theory of Inflation to study the case where the continuous shift symmetry of the Goldstone boson πis softly broken to a discrete subgroup. This case in…
Analytic result for the two-loop six-point NMHV amplitude in N=4 super Yang-Mills theory
Lance J. Dixon, James M. Drummond, Johannes M. Henn
We provide a simple analytic formula for the two-loop six-point ratio function of planar N = 4 super Yang-Mills theory. This result extends the analytic knowledge of multi-loop six…