Two roles of relativistic spin operators

Daniel R. Terno*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)


Spin degrees of freedom appear in a; variety of applications in quantum information theory and foundations of quantum mechanics, and usually are analyzed nonrelativistically. Two standard spin operators for massive spin-1/2 particles, the rest-frame spin and the Dirac spin operator Σ that is associated with the spin of moving particles are considered. As such, these two quantities can serve as prototypes for various alternative "spin operators".

Original languageEnglish
Article number014102
Pages (from-to)1-4
Number of pages4
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
Publication statusPublished - Jan 2003
Externally publishedYes


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