Experimental quantum cryptography scheme based on orthogonal states

FREE-DOWNLOADA Avella, G Brida, IP Degiovanni, M Genovese… – Physical Review A, 2010
Since, in general, nonorthogonal states cannot be cloned, any eavesdropping attempt in a
quantum-communication scheme using nonorthogonal states as carriers of information introduces
some errors in the transmission, leading to the possibility of detecting the spy. Usually