Gogolin A. O., Ioselevich A. S.
A polaron of a new type is proposed. In it, the localization of the electron is not accompanied by a deformation of the lattice, as in an ordinary polaron. The "clothing" on the polaron in this case arises from a local suppression of quantum fluctuations of the lattice. Such a polaron arises if the quadratic electron-phonon interaction is strong.