Corpus ID: 56313093

On the Classical and Quantum Stability of a Cosmic Ghost

  title={On the Classical and Quantum Stability of a Cosmic Ghost},
  author={Stephon Alexander and Sam Cormack and David Lowe and Robert Sims},
  • Stephon Alexander, Sam Cormack, +1 author Robert Sims
  • Published 2017
  • Physics
  • Ghost fields have reemerged in a handful of phenomenologically motivated cosmological and particle physics scenarios, and most recently in a cyclic mechanism to address the fine-tuning of gauge couplings in the standard model. We study the classical and quantum stability of a ghost-dilaton system coupled to a gauge sector and find that this system is classically stable due to the existence of limit cycles in phase space. We also analyze the coupled gauge invariant classical perturbations and… CONTINUE READING

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