# Question about quantum mechanics formalism

Are degenerate states stationary in quantum mechanics? I know that stationary state means single wavefunction corresponding to single energy. But, what will be in the case of several wavefunctions corresponds to single energy (e.g. degenerate states). are All of them stationary in that case? Can you pls give me explicit difference of stationary state and non stationary?

• @AltuhaAbdu if the Hamiltonian changes with time, the eigenstate of $H(t_1)$ are not eigenstates of $H(t_2)$. Also, the eigenvalues change, too. There is no energy conservation. Jul 26 '20 at 10:31