agitation. In this case we have to consider the Hamiltonian of the ensemble of the atom. Such a Hamiltonian will contain all the terms described above for
Yuefan Deng; Chen Ning Yang. Eigenvalues and eigenfunctions of the Hückel Hamiltonian for carbon-60. Physics Letters A. 1992-10-26, 170 (2). ISSN 0375-9601