Consider a system of N non-interacting simple harmonic oscillators (SHO) of frequency ν in equilibrium with a thermal reservoir of temperature T. The energy of each SHO is ε_n = n h ν, where n can be 0, 1, 2, 3, ....
Calculate the partition function of the system and the Helmholtz free energy.
Obtain the entropy of the system.
Calculate the total energy.