Quantum fluctuations in magnetic nanostructures

The problem of quantum fluctuations in magnetic nanostructures is discussed by considering a linear chain of a finite number of atoms with the exchange interaction of the electron spins of neighboring atoms, as in Heisenberg's theory of ferromagnetism. Electromagnetic magnetic dipole radiation from a spin flip wave is calculated. It is shown that including quantum field fluctuations in the radiation energy flux calculations gives much larger values than in the case of the averaged electromagnetic field. Radiation decay due to spin interaction with the quantized electromagnetic field is estimated.