经典味空间锁定规范场辐射的宇宙学后果
Cosmological consequences of classical flavor-space locked gauge field radiation
摘要：
我们提出了一个经典SU（2）规范场在味空间锁定位形中作为早期宇宙中的一种辐射，并表明它将对原初随机引力波谱产生重要的影响.在风味空间锁定配置中，每种风味的电场和磁场与其它风味平行且相互正交，具有各向同性和均匀的应力-能量。由于非阿贝尔耦合，规范场破坏了左右圆极化引力波的对称性。这种破缺的手征对称性导致了一个独特的信号：宇宙微波背景温度和极化的非零互相关，$TB$和$EB$，在标准的手征对称情况下，两者都应该是零。我们预测当前和未来的CMB实验的能力，以约束这个模型。此外，出现了广泛的行为，这取决于规范场耦合，丰度，并分配到电场和磁场能量密度。原初引力波的涨落功率在规范场的涨落中来回振荡。在某些情况下，引力波被抑制或放大，其幅度取决于规范场的初始条件。
英文摘要：
We propose a classical SU(2) gauge field in a flavor-space locked configuration as a species of radiation in the early universe, and show that it would have a significant imprint on a primordial stochastic gravitational wave spectrum. In the flavor-space locked configuration, the electric and magnetic fields of each flavor are parallel and mutually orthogonal to other flavors, with isotropic and homogeneous stress-energy. Due to the non-Abelian coupling, the gauge field breaks the symmetry between left- and right-circularly polarized gravitational waves. This broken chiral symmetry results in a unique signal: non-zero cross correlation of the cosmic microwave background temperature and polarization, $TB$ and $EB$, both of which should be zero in the standard, chiral symmetric case. We forecast the ability of current and future CMB experiments to constrain this model. Furthermore, a wide range of behavior is shown to emerge, depending on the gauge field coupling, abundance, and allocation into electric and magnetic field energy density. The fluctuation power of primordial gravitational waves oscillates back and forth into fluctuations of the gauge field. In certain cases, the gravitational wave spectrum is shown to be suppressed or amplified by up to an order of magnitude depending on the initial conditions of the gauge field.
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