论文标题
PVLAS实验：测量真空磁性双折射的25年努力
The PVLAS experiment: a 25 year effort to measure vacuum magnetic birefringence
论文作者
论文摘要
本文描述了通过PVLAS实验测量真空磁双发性和二分法的25年努力。该实验经历了两个主要阶段：第一个使用旋转超导磁铁，第二个使用两个旋转永久磁铁。该实验无法达到QED的预测值。但是，该实验设定了当前对$ b _ {\ rm ext}领域的真空磁性双折射和二分法的最佳限制（10 \ pm28）\ times10^{ - 23} $。 $Δn^{\ rm（pvlas）} $上的不确定性比$Δn^{\ rm（qed）} = 2.5 \ times10^{ - 23} $ @ 2.5 t的预测值高于预测值的因子7。
This paper describes the 25 year effort to measure vacuum magnetic birefringence and dichroism with the PVLAS experiment. The experiment went through two main phases: the first using a rotating superconducting magnet and the second using two rotating permanent magnets. The experiment was not able to reach the predicted value from QED. Nonetheless the experiment set the current best limits on vacuum magnetic birefringence and dichroism for a field of $B_{\rm ext} = 2.5$ T, namely, $Δn^{\rm (PVLAS)} = (12\pm17)\times10^{-23}$ and $|Δκ|^{\rm (PVLAS)} = (10\pm28)\times10^{-23}$. The uncertainty on $Δn^{\rm (PVLAS)}$ is about a factor 7 above the predicted value of $Δn^{\rm (QED)} = 2.5\times10^{-23}$ @ 2.5 T.
