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66 papers · 1 filter
Brane dynamics, central charges and E_{11}
Peter West
We consider a theory in which supersymmetry is partially spontaneously broken and show that the dynamical fields in the same supersymmetric multiplet as the Goldstino are Goldstone…
Cosmic Acceleration and the String Coupling
John Ellis, N. E. Mavromatos, D. V. Nanopoulos
In the context of a cosmological string model describing the propagation of strings in a time-dependent Robertson-Walker background space-time, we show that the asymptotic accelera…
Non-extremal instantons and wormholes in string theory
E. Bergshoeff, A. Collinucci, U. Gran +2
We construct the most general non-extremal spherically symmetric instanton solution of a gravity-dilaton-axion system with symmetry, for arbitrary euclidean spacetime dim…
Optimal coupling of entangled photons into single-mode optical fibers
R. Andrews, E. R. Pike, Sarben Sarkar
We present a consistent multimode theory that describes the coupling of single photons generated by collinear Type-I parametric down-conversion into single-mode optical fibers. We…
Dark Energy in the Universe, the Irreversibility of Time and Neutrinos
N. E. Mavromatos
In this review, I discuss briefly how the presence of a cosmological constant in the Universe may imply a decoherent evolution of quantum matter in it, and as a consequence a funda…
Intersecting hypersurfaces in AdS and Lovelock gravity
Elias Gravanis, Steven Willison
Colliding and intersecting hypersurfaces filled with matter (membranes) are studied in the Lovelock higher order curvature theory of gravity. Lovelock terms couple hypersurfaces of…