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Dissertation
The Classical Exotic Superstring
Authors: --- ---
Year: 2022 Publisher: Leuven KU Leuven. Faculteit Wetenschappen

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Abstract

In a paper of Hull , he discovered that there exist pathological supergravity theories. These supergravity theories should correspond with superstring theories. These string theories are very interesting since they have de Sitter vacua. In this thesis we will focus on classical exotic superstrings i.e. superstrings that move outside the lightcone. We follow the suggestion by Dijkgraaf Et al. and consider the exotic superstring as a candidate for the string theory of Hull's supergravity theories . We will specifically focus on the RNS and GS formalism, which are two ways to include fermions on the bosonic string and make a superstring. In the RNS formalism, it has already been proven that the exotic superstring turns out to be supersymmetric in spacetime. In the GS formalism, it has not yet been proven that the exotic superstring is supersymmetric in spacetime. Proving this will be the original calculation of this thesis.

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Dissertation
Mémoire
Authors: --- --- --- --- --- et al.
Year: 2024 Publisher: Liège Université de Liège (ULiège)

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Abstract

The Global Meridional Overturning Circulation (GMOC) is a global ocean circulation which redistributes heat, freshwater and nutrients around the globe. It plays an important role in climate, biogeochemical cycling and marine ecosystems. This thesis investigates the effect of Antarctic meltwater runoff in the Southern Ocean on the Meridional Overturning Circulation in the Atlantic basin with a global ocean model, the Nucleus for European Modelling of the Ocean (NEMO). We find a weakening of the Antarctic Bottom Water (AABW) circulation and an increase in the North Atlantic Deep water circulation. Moreover, we find that the abyssal ocean is warming. Lastly, we find important sea surface temperature and sea surface salinity signals in the North Atlantic, North Pacific and the El Niño region.

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