Dynamics of gravity in a Higgs phase
Dynamics of gravity in a Higgs phase
复制标题
DOI：
10.1088/1126-6708/2007/01/036
复制
发表时间：
2005-07
影响因子：
5.4
通讯作者：
N. Arkani-Hamed;Hsin-Chia Cheng;M. Luty;S. Mukohyama;T. Wiseman
中科院分区：
文献类型：
--
作者：
N. Arkani-Hamed;Hsin-Chia Cheng;M. Luty;S. Mukohyama;T. Wiseman
我们研究了引力最简单的希格斯相“幽灵凝聚”的普遍低能动力学。“我们表明，‘幽灵’场的非线性动力学在所有有趣的引力源中占主导地位。远离焦散奇点，动力学等价于状态方程为pρ2的理想流体的无旋流动，其中流体粒子可以具有负质量。我们认为，这个理论是免费的灾难性的不稳定性，由于增长模式，即使零能量条件被违反。数值模拟表明，一般的解决方案有奇异性，负能量区域收缩到零的大小。我们展示了部分UV完成的理论，其中这些奇点顺利解决，所以这并不意味着任何不一致的有效理论。我们还考虑了对称性破缺尺度M的界。我们认为，非线性动力学切断了牛仔不稳定性的线性理论，并允许M 100 GeV。
We investigate the universal low-energy dynamics of the simplest Higgs phase for gravity, `ghost condensation.' We show that the nonlinear dynamics of the `ghostone' field dominate for all interesting gravitational sources. Away from caustic singularities, the dynamics is equivalent to the irrotational flow of a perfect fluid with equation of state pρ2, where the fluid particles can have negative mass. We argue that this theory is free from catastrophic instabilities due to growing modes, even though the null energy condition is violated. Numerical simulations show that solutions generally have singularities in which negative energy regions shrink to zero size. We exhibit partial UV completions of the theory in which these singularities are smoothly resolved, so this does not signal any inconsistency in the effective theory. We also consider the bounds on the symmetry breaking scale M in this theory. We argue that the nonlinear dynamics cuts off the Jeans instability of the linear theory, and allows M 100 GeV.