Astrophysics > Cosmology and Nongalactic Astrophysics
[Submitted on 27 Aug 2012
(v1)
, last revised 9 Jul 2013 (this version, v3)]
Title: Polarizing primordial gravitational waves by parity violation
Title: 通过宇称破坏极化原初引力波
Abstract: We study primordial gravitational waves (PGWs) in the Horava-Lifshitz (HL) theory of quantum gravity, in which high-order spatial derivative operators, including the ones violating parity, generically appear in order for the theory to be power-counting renormalizable and ultraviolet (UV) complete. Because of both parity violation and non-adiabatic evolution of the modes due to a modified dispersion relationship, a large polarization of PGWs becomes possible, and it could be well within the range of detection of the BB, TB and EB power spectra of the forthcoming cosmic microwave background (CMB) observations.
Submission history
From: Anzhong Wang [view email][v1] Mon, 27 Aug 2012 20:00:07 UTC (476 KB)
[v2] Sun, 5 May 2013 20:10:49 UTC (495 KB)
[v3] Tue, 9 Jul 2013 09:22:52 UTC (104 KB)
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