Applications of the Jaynes-Cummings model for the detection of nonorthogonal quantum states

This paper presents two kinds of applications of the Jaynes-Cummings model to improve detection schemes for the binary phase-shift-keyed signals of the coherent states \alpha] and \-alpha]. The first application raises the amount of exact retrodiction of a mixture made by choosing at random from \alpha] and \-alpha]. The second application is concerned with realizing the optimum receiver to achieve a low decision error. Instead of optical detection, atomic level detection after mapping from them to two-level states of an atom will be proposed.