Single-photon interferometry with orbital angular momentum circumvents standard wave-particle duality
arXiv:0705.4038
Abstract
A polarized photon with well-defined orbital angular momentum that emerges from a Mach-Zehnder interferometer (MZI) is shown to circumvent wave-particle duality. Its polarization-resolved detection probability forms a non-sinusoidal interferometric pattern. For certain phase differences between the MZI arms, this pattern yields both reliable which-path information and high phase-sensitivity.
4 pages, 3 figures