Spontaneous emission of a moving atom in the presence of magnetodielectric material: A relativistic approach

OPTICS COMMUNICATIONS

卷:426

Article

Shafieiyan, Fariba¹  Amooghorban, Ehsan^1,2,3  Mahdifar, Ali^1,2,4 

[1] Shahrekord Univ, Fac Basic Sci, Dept Phys, POB 115, Shahrekord 8818634141, Iran

[2] Shahrekord Univ, Photon Res Grp, Shahrekord 8818634141, Iran

[3] Shahrekord Univ, Nanotechnol Res Ctr, Shahrekord 8818634141, Iran

[4] Univ Isfahan, Fac Sci, Dept Phys, Hezar Jerib 8174673441, Isfahan, Iran

关键词: Canonical quantization;    Spontaneous emission;    Multipolar Hamiltonian;    Rontgen interaction;   

DOI  :  10.1016/j.optcom.2018.05.037

来源: Elsevier

【 摘 要 】

In this paper, based on a canonical quantization scheme, we study the effect of the relativistic motion of an excited atom on its decay rate in the presence of absorbing and dispersive media. For this purpose, we introduce an appropriate Lagrangian and describe the center-of-mass dynamical variables by the Dirac field. We obtain the Hamiltonian of the system in a multipolar form and calculate the motion equations of the system in the Schrodinger picture. We find that the decay rate and the quantum electrodynamics level shift of the moving atom can be expressed in terms of the imaginary part of the classical Green tensor and the center-of-mass velocity of the atom.

【 授权许可】

Free