Optimal state discrimination in PRL

Vectors and probabilities in three dimensions

Vectors and probabilities in three dimensions

In the July 11th edition of PRL we report on the optimal state discrimination of high-dimensional quantum states.

High-dimensional states can carry more information and provide more ways to encode messages than a typical two-dimensional state.  Using our technique, we have successfully distinguished non-orthogonal, high-dimensional states without error.  Our technique paves the way for error-free communication at the limits imposed by quantum information science.