Kurt, ArzuEryiğit, Resul2021-06-232021-06-2320150375-96011873-2429https://doi.org/10.1016/j.physleta.2015.09.050https://hdl.handle.net/20.500.12491/8117The master equation for a charged harmonic oscillator coupled to an electromagnetic reservoir is investigated up to fourth order in the interaction strength by using Krylov averaging method. The interaction is in the velocity-coupling form and includes a diamagnetic term. Exact analytical expressions for the second-, the third-, and the fourth-order contributions to mass renormalization, decay constant, normal and anomalous diffusion coefficients are obtained for the blackbody type environment. It is found that, generally, the third- and the fourth-order contributions have opposite signs when their magnitudes are comparable to that of the second-order one. (C) 2015 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/closedAccessCharged Harmonic OscillatorFourth-Order Master EquationVelocity-CouplingArticle10.1016/j.physleta.2015.09.05037947-48303730442-s2.0-84946146935Q2WOS:000365052800005Q2