A set of states for this system forms a prototypical overcomplete basis for which one can apply E. C. G. Sudarshan’s P representation. The Hardy–Hille formula generalizes the propagator of this system, called the Mehler (10[1])kernel. Each index in a Fock space is given by one of these systems, since a real scalar (-5[1])field is represented by infinitely many of these systems coupled together. Roy J. Glauber introduced this system’s canonical coherent states. An independent collection of these systems are modelled in an Einstein solid. (10[1])Operators (10[1])denoted a and a-dagger are used to solve for this system’s energy levels (10[1])and are denoted (10[1])“creation” and “annihilation,” respectively. This system’s energy levels are quantized in units of h-bar omega. (-5[1])For 10 points, name this non-classical analogue of a mass on a spring. (10[1])■END■ (10[2]0[1])