Gravitational waves in intrinsic time geometrodynamics

Eyo Eyo Ita, Cho-Pin Soo, Hoi Lai Yu

研究成果: Article

摘要

Gravitational waves are investigated in Intrinsic Time Geometrodynamics. This theory has a non-vanishing physical Hamiltonian generating intrinsic time development in our expanding universe, and four-covariance is explicitly broken by higher spatial curvature terms. Linearization of Hamilton’s equations about the de Sitter solution produces transverse traceless excitations, with the physics of gravitational waves in Einstein’s General Relativity recovered in the low curvature low frequency limit. A noteworthy feature of this theory is that gravitational waves always carry positive energy density, even for compact spatial slicings without any energy contribution from boundary Hamiltonian. This study of gravitational waves in compact k= + 1 cosmological de Sitter spacetime is in contradistinction to, and complements, previous k= - 1 investigations of Hawking, Hertog and Turok and other more familiar k= 0 works. In addition, possible non-four-covariant Horava gravity contributions are considered (hence the use of canonical Hamiltonian, rather than Lagrangian, methods). Recent explicit S3 transverse-traceless mode spectrum of Lindblom, Taylor and Zhang are also employed to complete the discussion.

原文English
文章編號723
期刊European Physical Journal C
78
發行號9
DOIs
出版狀態Published - 2018 九月 1

指紋

Gravity waves
Hamiltonians
gravitational waves
relativity
curvature
slicing
Relativity
linearization
Linearization
complement
Gravitation
Physics
flux density
universe
gravitation
low frequencies
physics
excitation
energy

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

引用此文

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Gravitational waves in intrinsic time geometrodynamics. / Ita, Eyo Eyo; Soo, Cho-Pin; Yu, Hoi Lai.

於: European Physical Journal C, 卷 78, 編號 9, 723, 01.09.2018.

研究成果: Article

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