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Backreaction of Localised Sources in String Compactifications by Junghans, Daniel is a scholarly article available to read on EtoBox.

What is Backreaction of Localised Sources in String Compactifications about?

Localised sources such as D-branes or orientifold planes play an important role in many string compactifications that are relevant for phenomenology. The presence of these objects typically induces complicated dynamics in the compact dimensions such that a full solution to the 10d equations of motion is often out of reach. In order to still be able to make statements about the 4d effective theory arising in the low-energy limit, the equations of motion are usually only solved in an integrated sense, while the backreaction of the localised sources on the internal fields is neglected. This simplification is often referred to as smearing. In this work, we investigate to what extent smearing may affect observables in the effective low-energy theory and whether it may lead to fake solutions that would cease to exist once the backreaction is properly taken into account. We analyse explicit examples for which smeared solutions exist and find that the reliability of the smeared approximation appears to depend on whether or not these solutions saturate a BPS bound. We also address the proposal of placing anti-D3-branes at the tip of a warped throat geometry like the Klebanov-Strassler solut

Author

Junghans, Daniel

Published

2013

Language

EN