Measuring a parity-violation signature in the early universe via ground-based laser interferometers.
Measuring a parity-violation signature in the early universe via ground-based laser interferometers.
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DOI：
10.1103/physrevlett.99.121101
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发表时间：
2007-07
影响因子：
8.6
通讯作者：
N. Seto;A. Taruya
中科院分区：
文献类型：
--
作者：
N. Seto;A. Taruya
我们表明，成对的相距甚远的干涉仪对于测量引力波随机背景的斯托克斯参数V是有利的。这个参数表征了左右手波振幅的不对称性，这种不对称性的产生与早期宇宙中的宇称破坏密切相关。有利的对包括更大尺寸的干涉仪LIGO（利文斯顿）-LCGT和AIGO-Virgo，它们对Omega（GW）（背景的简单强度）相对不敏感。使用至少三个检测器，可以分别测量强度Ω（GW）和不对称度V的信息。
We show that pairs of widely separated interferometers are advantageous for measuring the Stokes parameter V of a stochastic background of gravitational waves. This parameter characterizes asymmetry of amplitudes of right- and left-handed waves, and generation of the asymmetry is closely related to parity violation in the early universe. The advantageous pairs include the kilometer-size interferometers LIGO (Livingston)-LCGT and AIGO-Virgo, which are relatively insensitive to Omega(GW) (the simple intensity of the background). Using at least three detectors, information of the intensity Omega(GW) and the degree of asymmetry V can be separately measured.