Experimental test of nonclassicality for a single particle
  In a recent paper [R. Alicki and N. Van Ryn, J. Phys. A: Math. Theor., 41, 062001 (2008)] a test of nonclassicality for a single qubit was proposed. Here, we discuss the class of local realistic theories to which this test applies and present an experimental realization. 
G.Brida, I. Degiovanni, M. Genovese, V. Schettini, S. Polyakov, A.   Migdall