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14 papers · 2 filters
Generalized Born--Infeld Actions and Projective Cubic Curves
S. Ferrara, M. Porrati, A. Sagnotti +2
We investigate supersymmetric Born-Infeld Lagrangians with a second non-linearly realized supersymmetry. The resulting non-linear structure is more complex than the sq…
Vainshtein Solutions Without Superluminal Modes
Gregory Gabadadze, Rampei Kimura, David Pirtskhalava
The Vainshtein mechanism suppresses the fifth force at astrophysical distances, while enabling it to compete with gravity at cosmological scales. Typically, Vainshtein solutions ex…
Quantum Exclusion of Positive Cosmological Constant?
Gia Dvali, Cesar Gomez
We show that a positive cosmological constant is incompatible with the quantum-corpuscular resolution of de Sitter metric in form of a coherent state. The reason is very general an…
N=2 Born-Infeld Attractors
S. Ferrara, M. Porrati, A. Sagnotti
We derive new types of Born-Infeld actions based on N=2 special geometry in four dimensions. As in the single vector multiplet (n=1) case, the non--linear actions originat…
Looking for Integrability on the Worldsheet of Confining Strings
Patrick Cooper, Sergei Dubovsky, Victor Gorbenko +2
We study restrictions on scattering amplitudes on the worldvolume of branes and strings (such as confining flux tubes in QCD) implied by the target space Poincare symmetry. We focu…
Long String Dynamics in Pure Gravity on AdS
Jihun Kim, Massimo Porrati
We study the classical dynamics of a completion of pure AdS gravity in 3D, whose only degrees of freedom are boundary gravitons and long strings. We argue that the best regime for…