Finite Square Well and Quantum State Discrimination

In this paper, the finite square well and its application are investigated, namely quantum state discrimination. The is treated in all standard textbooks on introductory mechanics. It used as a simple 'model of departure' many areas physics. atomic molecular physics, it may be model an electron moving mean field linear molecule also arises partial wave radial equation for spherically symmetric, square-well potential. Schrodinger solved. domain divided into three regions by existing potential V0, so convenience, those named Region I, II, III, respectively. Specifically, I III that II 0. Also, constant needed to make function normalized. Then since function, necessary sure continuous differentiable everywhere within domain. Besides, needs either odd or even just like infinite well. After that, functions intervals can obtained, exact distinguished from group different states. end, two obtained; one form form. energy level corresponding with wavelength found listed. Local discrimination orthogonal states has attracted much attention during last twenty years. results applied quantum-information task discrimination, using obtained six assumed locally distinguishable, hypothesis measurements.