标题： 引力和自耦合的部分无质量自旋2 显示英文标题

标题： Gravitational- and Self- Coupling of Partially Massless Spin 2

摘要： 我们表明，与宇宙空间相关的高自旋系统会遇到与具有庞加莱极限的模型相同的问题。 特别是，我们分析了部分无质量（PM）自旋2，并发现其引力耦合和非线性扩展都存在通常的[背景和自耦合]困难：一致的自由场传播无法超越背景爱因斯坦几何。 然后，使用由相对的鬼态PM和引力子激发组成的共形Weyl引力（CG），我们发现避免引力子鬼态将CG生成的PM自耦合限制为通常的安全的、诺特电流三次形式。 显示英文摘要

摘要： We show that higher spin systems specific to cosmological spaces are subject to the same problems as models with Poincar'e limits. In particular, we analyse partially massless (PM) spin 2 and find that both its gravitational coupling and nonlinear extensions suffer from the usual [background- and self-coupling] difficulties: Consistent free field propagation does not extend beyond background Einstein geometries. Then, using conformal Weyl gravity (CG), which consists of relative ghost PM and graviton excitations, we find that avoiding graviton-ghosts restricts CG-generated PM self-couplings to the usual, safe, Noether current cubic ones.