Subwavelength interferometry using path entanglement and photon-number resolving detectors
G. Khoury, H. S. Eisenberg, Juan F. Hodelin, E. J. S. Fonseca, Dirk Bouwmeester · 2006
We demonstrate subwavelength interference fringes using two methods. The first preselects path entangled states from parametric downconversion, and the second uses multiphoton detection of classical light.