Quantization of the (sin phi)2-interaction in terms of fermion variables

The (sin phi)2-interaction quantization is carried out. It is shown that by the adopted method of Hamiltonian quantization the (sin phi)2-interaction Hamiltonian is equivalent to the Hamiltonian of the Fermian field which can at certain conditions be traced back to the Hamiltonian of the massive model of Tirring. (author)