利用静电类比探测变色龙暗能量
Detecting Chameleon Dark Energy via Electrostatic Analogy
摘要：
宇宙后期的加速膨胀可能是由小尺度上的标量场造成的，就像变色龙或变色龙场景一样。我们提出了这样的标量场和静电薄壳配置之间的类比，它允许一般扩展机构的场分布的计算。有趣的是，磁场显示出一种“避雷针”效应，即在尖形或细长形物体的两端附近增强。从这个对应关系，我们表明，非球形测试机构沉浸在背景场将经历一个净扭矩所造成的标量场。这种效应在引力的情况下没有对应物，可以在未来的实验中进行测试。
英文摘要：
The late-time accelerated expansion of the universe could be caused by a scalar field that is screened on small scales, as in chameleon or symmetron scenarios. We present an analogy between thin shell configurations of such scalar fields and electrostatics, which allows calculation of the field profile for general extended bodies. Interestingly, the field demonstrates a `lightning rod' effect, where it becomes enhanced near the ends of a pointy or elongated object. Drawing from this correspondence, we show that non-spherical test bodies immersed in a background field will experience a net torque caused by the scalar field. This effect, with no counterpart in the gravitational case, can be potentially tested in future experiments.
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