Leach Jonathan, Padgett Miles J, Barnett Stephen M, Franke-Arnold Sonja, Courtial Johannes
Department of Physics and Astronomy, University of Glasgow, Glasgow, Scotland.
Phys Rev Lett. 2002 Jun 24;88(25 Pt 1):257901. doi: 10.1103/PhysRevLett.88.257901. Epub 2002 Jun 5.
We propose an interferometric method for measuring the orbital angular momentum of single photons. We demonstrate its viability by sorting four different orbital angular momentum states, and are thus able to encode two bits of information on a single photon. This new approach has implications for entanglement experiments, quantum cryptography and high density information transfer.
我们提出了一种用于测量单光子轨道角动量的干涉测量方法。我们通过对四种不同的轨道角动量状态进行分选来证明其可行性，从而能够在单个光子上编码两位信息。这种新方法对纠缠实验、量子密码学和高密度信息传输具有重要意义。
