Optimal discrimination of M coherent states with a small quantum computer
Marcus P. da Silva, Saikat Guha, Zachary Dutton · AIP conference proceedings · 2014
The ability to distinguish between coherent states optimally plays in important role in the efficient usage of quantum resources for classical communication and sensing applications. While it has been known since the early 1970’s how to optimally distinguish between two coherent states, generalizations to larger sets of coherent states have so far failed to reach optimality. In this work we outline how optimality can be achieved by using a small quantum computer, building on recent proposals for optimal qubit state discrimination with multiple copies.