Hamiltonian approach to second order gauge invariant cosmological perturbations

  title={Hamiltonian approach to second order gauge invariant cosmological perturbations},
  author={Guillem Dom{\`e}nech and M. Sasaki},
  journal={Physical Review D},
  • Guillem Domènech, M. Sasaki
  • Published 2017
  • Physics
  • Physical Review D
  • In view of growing interest in tensor modes and their possible detection, we clarify the definition of tensor modes up to 2nd order in perturbation theory within the Hamiltonian formalism. Like in gauge theory, in cosmology the Hamiltonian is a suitable and consistent approach to reduce the gauge degrees of freedom. In this paper we employ the Faddeev-Jackiw method of Hamiltonian reduction. An appropriate set of gauge invariant variables that describe the dynamical degrees of freedom may be… CONTINUE READING


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