利用光在磁场中的传播验证变色龙理论
Testing Chameleon Theories with Light Propagating through a Magnetic Field
摘要：
最近有人认为，所观察到的PVLAS异常可以解释变色龙场论，其中可以避免大的偏离牛顿定律。在这里，我们提出的二向色性和双折射在真空中诱导的磁场在这些模型的预测。我们表明，变色龙粒子的行为非常不同的标准类轴子粒子（ALP）。我们发现，与碱性磷酸酶，变色龙颗粒被限制在实验设置。因此，在PVLAS型实验中，双折射率总是大于二向色性。
英文摘要：
It was recently argued that the observed PVLAS anomaly can be explained by chameleon field theories in which large deviations from Newton's law can be avoided. Here we present the predictions for the dichroism and the birefringence induced in the vacuum by a magnetic field in these models. We show that chameleon particles behave very differently from standard axion-like particles (ALPs). We find that, unlike ALPs, the chameleon particles are confined within the experimental set-up. As a consequence, the birefringence is always bigger than the dichroism in PVLAS-type experiments.
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