宇宙各向异性模型
A Model of Universe Anisotropization
摘要：
在粒子物理标准模型的Lorentz破坏扩展的光子部分中，存在一个非共形不变项，即“Kosteleckands项”$\mathcal{L}_K \propto (k_F)_{αβμν} F^{αβ} F^{\m ν}$，使得de Sitter暴胀过程中磁真空涨落的超绝热放大成为可能.对于一个特定形式的外部张量$k_F$，参数化洛伦兹破坏，所产生的领域具有平面对称性在大宇宙尺度，今天可以有一个纳米级的强度为定义通货膨胀的参数值的范围很广。这种奇特的磁场可以解释目前观测到的银河系磁场，并在宇宙学尺度上引起宇宙的微小各向异性。由此产生的Bianchi I模型可以解释宇宙微波背景辐射中假定的低四极功率。
英文摘要：
The presence of a nonconformally invariant term in the photon sector of the Lorentz-violating extension of Standard Model of particle physics, the "Kostelecký term" $\mathcal{L}_K \propto (k_F)_{αβμν} F^{αβ} F^{\m ν}$, enables a superadiabatic amplification of magnetic vacuum fluctuations during de Sitter inflation. For a particular form of the external tensor $k_F$ that parameterizing Lorentz violation, the generated field possesses a planar symmetry at large cosmological scales and can have today an intensity of order of nanogauss for a wide range of values of parameters defining inflation. This peculiar magnetic field could account for the presently-observed galactic magnetic fields and induces a small anisotropization of the universe at cosmological scales. The resulting Bianchi I model could explain the presumedly low-quadrupole power in the Cosmic Microwave Background radiation.
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