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Studies in String Cosmology

  • Kartonierter Einband
  • 276 Seiten
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In this book we study the problem of moduli stabilisation in a cosmological context of string theory. Motivated by the moduli stab... Weiterlesen
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Beschreibung

In this book we study the problem of moduli stabilisation in a cosmological context of string theory. Motivated by the moduli stabilisation problem, we introduce for the first time chameleon fields, so named because their masses and values depend sensitively on the local matter density. We show that such fields can evade all local tests of the equivalence principle and we make predictions for near-future tests of gravity in space while driving the current phase of cosmic accelerated expansion. We then study string corrections to racetrack inflation, a proposal for inflationary dynamics in the context of flux compactifications. Finally, we study a truncated low energy effective action that models the neighbourhood of special points in moduli space, such as conifold points, where extra massless degrees of freedom arise. We study moduli dynamics and stabilisation in this context in a cosmological background and find surprising variety in field dynamics including the appearance of chaos. The chaos aids in our understanding of the behaviour of moduli near these special points. In particular we find a viable mechanism for trapping some of the moduli near these points.

Autorentext

Dr. Weltman, daughter of Ivan and Sheina Weltman, grew up in Johannesburg and Cape Town, South Africa. In 2007 she completed her PhD at Columbia University under the supervision of Professor Brian Greene. After a postdoc at Cambridge University, she is currently faculty at the University of Cape Town, where she completed her undergraduate studies.

Produktinformationen

Titel: Studies in String Cosmology
Untertitel: From Chameleons to Chaos
Autor:
EAN: 9783639080193
ISBN: 978-3-639-08019-3
Format: Kartonierter Einband
Herausgeber: VDM Verlag
Genre: Sonstiges
Anzahl Seiten: 276
Gewicht: 427g
Größe: H220mm x B150mm x T17mm
Veröffentlichung: 01.12.2008
Jahr: 2008