EAN: 9783031404320

SPRINGERBRIEFS IN PHYSICS INSTABILITIES IN FI...

This book presents the most common types of instabilities arising in classical field theories 
namely tachyonic  Laplacian  ghost-like or strong coupling instabilities  also commenting on
their quantum implications. The authors provide a detailed account on the Ostrogradski theorem
and its implications for higher-order time-derivative field theories. After presenting the
general concepts and formalism  they dive into its applications to particular field theories 
using mainly modified gravity theories as examples. The book is intended for advanced
undergraduate graduate students  but can also be useful for researchers  for having a unified
exposition of general results on instabilities in field theory and examples of their
applications.

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