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What is the relativistic spin operator?

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30283

Bauke,  Heiko
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons37673

Ahrens,  Sven
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30659

Keitel,  Christoph H.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons37929

Grobe,  Rainer
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
Intense Laser Physics Theory Unit and Department of Physics, Illinois State University, Normal, IL 61790-4560, USA ;

Externe Ressourcen
Volltexte (frei zugänglich)

1303.3862.pdf
(Preprint), 281KB

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Zitation

Bauke, H., Ahrens, S., Keitel, C. H., & Grobe, R. (2014). What is the relativistic spin operator? New Journal of Physics, 16(4): 043012. doi:10.1088/1367-2630/16/4/043012.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-001A-02E1-7
Zusammenfassung
Although the spin is regarded as a fundamental property of the electron, there is no universally accepted spin operator within the framework of relativistic quantum mechanics. We investigate the properties of different proposals for a relativistic spin perator. It is shown that most candidates are lacking essential features of proper angular momentum operators, leading to spurious Zitterbewegung (quivering motion) or violating the angular momentum algebra. Only the Foldy-Wouthuysen operator and the Pryce operator qualify as proper relativistic spin operators. We demonstrate that ground states of highly charged hydrogen-like ions can be utilized to identify a legitimate relativistic spin operator experimentally.