title: Dynamics of an electron spin  in  strong classical and quantized electromagnetic fields
creator: Skoromnik, Oleg
subject: ddc-530
subject: 530 Physics
description: The electron motion in the presence of a strong classical and quantized pulse of an electromagnetic  field is studied with a special emphasis on the spin degree of freedom. It is shown  that the Hamiltonian of this system can be separated into two parts with the help of canonical  transformations of the field variables, namely the interaction between an electron and a singlecollective-  mode of the field and fluctuations relatively to this collective-mode. The application  of perturbation theory to the fluctuations allows the conditions of applicability of the singlemode  approximation for the quantized external field to be formulated. Furthermore, within this  approximation the electron spin evolution is investigated. In addition to fast spin oscillations at  the laser frequency, a second time scale is identified due to the intensity-dependent emissions  and absorptions of field quanta, that is collapse and revival dynamics. The effect is observable  at the experimentally feasible intensity of 1018 W=cm2. After this, we switch to the regime of  higher intensities, when the fluctuations of the external field can be neglected. We investigate  the asymmetries in the electron scattering arising due to the electron polarization and pulse  duration, and constrain the optimal conditions for the asymmetry observation.
date: 2014
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/17148/1/diss_Skoromnik.pdf
identifier: DOI:10.11588/heidok.00017148
identifier: urn:nbn:de:bsz:16-heidok-171488
identifier:   Skoromnik, Oleg  (2014) Dynamics of an electron spin in strong classical and quantized electromagnetic fields.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/17148/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng