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Entanglement Theory Quantum Correlations Quantum Simulation Quantum State Preparation Representation

Resolution of a conflict between Laser and Elementary Particle Physics

arXiv
Authors: Elliot Leader

Year

2015

Paper ID

26751

Status

Preprint

Abstract Read

~2 min

Abstract Words

110

Citations

N/A

Abstract

The claim some years ago, contrary to all textbooks, that the angular momentum of a photon (and gluon) can be split in a gauge-invariant way into an orbital and spin term, sparked a major controversy in the Particle Physics community. A further cause of upset was the realization that the gluon polarization in a nucleon, a supposedly physically meaningful quantity, corresponds only to the gauge-variant gluon spin derived from Noether's theorem, evaluated in a particular gauge. On the contrary, Laser Physicists have, for decades, been happily measuring physical quantities which correspond to orbital and spin angular momentum evaluated in a particular gauge. This paper reconciles the two points of view.

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  • The claim some years ago, contrary to all textbooks, that the angular momentum of a photon (and gluon) can be split in a gauge-invariant way into an orbital and spin term...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1510.03293 [2] arXiv https://arxiv.org/abs/1510.03293 [3] Publisher https://arxiv.org/abs/1510.03293

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