标题： 单光子几何相位的偏振测量 显示英文标题

标题： Polarimetric measurements of single-photon geometric phases

摘要： 我们报告了对在庞加莱球面上沿非测地线轨迹演化的偏振光子产生的几何相位的偏振测量。 我们的偏振阵列的核心由七个波片组成，这些波片被单个光子束穿过。 通过利用几何相位在U(1)局部变换下的规范不变性，我们消除了总相位中的动力学贡献，从而使后者与几何相位一致。 我们证明了我们的装置对进入其中的各种噪声源不敏感。 这使得单光束偏振阵列成为一种有前景且多功能的工具，用于测试几何相位对抗噪声的鲁棒性。 显示英文摘要

摘要： We report polarimetric measurements of geometric phases that are generated by evolving polarized photons along non-geodesic trajectories on the Poincar\'e sphere. The core of our polarimetric array consists of seven wave plates that are traversed by a single photon beam. With this array any SU(2) transformation can be realized. By exploiting the gauge invariance of geometric phases under U(1) local transformations, we nullify the dynamical contribution to the total phase, thereby making the latter coincide with the geometric phase. We demonstrate our arrangement to be insensitive to various sources of noise entering it. This makes the single-beam, polarimetric array a promising, versatile tool for testing robustness of geometric phases against noise.