Quantum field theory treatment of magnetic effects on the spin and orbital angular momentum of a free electron
| Autor: | Philip Kurian, C. Verzegnassi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Quantum Physics Spin polarization FOS: Physical sciences General Physics and Astronomy Spin engineering 02 engineering and technology Spin–orbit interaction 021001 nanoscience & nanotechnology 01 natural sciences Electron magnetic dipole moment Spin quantum number Quantum mechanics Quantum electrodynamics 0103 physical sciences Orbital motion Angular momentum coupling Orbital angular momentum of light Quantum Physics (quant-ph) 010306 general physics 0210 nano-technology |
| Zdroj: | Physics Letters A. 380:394-396 |
| ISSN: | 0375-9601 |
| DOI: | 10.1016/j.physleta.2015.11.002 |
| Popis: | We consider in a quantum field theory framework the effects of a classical magnetic field on the spin and orbital angular momentum (OAM) of a free electron. We derive formulae for the changes in the spin and OAM due to the introduction of a general classical background field. We consider then a constant magnetic field, in which case the relevant expressions of the effects become much simpler and conversions between spin and OAM become readily apparent. An estimate of the expectation values for a realistic electron state is also given. Our findings may be of interest to researchers in spintronics and the field of quantum biology, where electron spin has been implicated on macroscopic time and energy scales. Comment: 3 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect