Modifications in the Spectrum of Primordial Gravitational Waves Induced by Instantonic Fluctuations

Details Modifications in the Spectrum of Primordial Gravitational Waves Induced by Instantonic Fluctuations Modifications in the Spectrum of Primordial Gravitational Waves Induced by Instantonic Fluctuations

2010-07-21

arxiv.org/abs/1007.3732v4

Phys.Rev.D84:044035,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

V1: 8 pages. V2: 8 pages, some points clarified, typos corrected, some references added, final result unchanged. V3: 8 pages,

Scientific paper

10.1103/PhysRevD.84.044035

Vacuum to vacuum instantonic transitions modify the power spectrum of
primordial gravitational waves. We evaluate the new form of the power spectrum
for ordinary gravity as well as the parity violation induced in the spectrum by
a modification of General Relativity known as Holst term and we outline the
possible experimental consequences.

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