Abstract
Assuming two quantum states of spontaneous parametric downconversion carrying orbital angular momentum, one may ask the question what is the minimum probability of error in identifying between two of these biphoton states by an arbitrary physical measurement over the biphoton state generated. While correctly chosen geometries may lead to perfect distinguishability of modes, it is worth noticing that experimental subtleties may lead to a poor mode distinguishability. We discuss the case where a restricted range instead of the needed range of wave vectors is collected by the experimental setup. These considerations may be useful for some applications, e.g., cryptography.
© 2008 Optical Society of America
Full Article | PDF ArticleMore Like This
B. Coutinho dos Santos, A. Z. Khoury, and J. A. O. Huguenin
Opt. Lett. 33(23) 2803-2805 (2008)
Yan Yan, Jian Wang, Lin Zhang, Jeng-Yuan Yang, Irfan M. Fazal, Nisar Ahmed, Bishara Shamee, Alan E. Willner, Kevin Birnbaum, and Sam Dolinar
Opt. Lett. 36(21) 4269-4271 (2011)
Juan P. Torres, Clara I. Osorio, and Lluis Torner
Opt. Lett. 29(16) 1939-1941 (2004)