New Angular Momentum Conservation Laws for Gauge Fields in QED Article Swipe
Farhad Khosravi
,
Li‐Ping Yang
,
Pronoy Das
,
Zubin Jacob
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2405.02143
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2405.02143
Quantum electrodynamics (QED) deals with the relativistic interaction of bosonic gauge fields and fermionic charged particles. In QED, global conservation laws of angular momentum for light-matter interactions are well-known. However, local conservation laws, i.e. the conservation law of angular momentum at every point in space, remain unexplored. Here, we use the QED Lagrangian and Noether's theorem to derive a new local conservation law of angular momentum for Dirac-Maxwell fields in the form of the continuity relation for linear momentum. We separate this local conservation law into four coupled motion equations for spin and orbital angular momentum (OAM) densities. We introduce a helicity current tensor, OAM current tensor, and spin-orbit torque in the motion equations to shed light on on the local dynamics of spin-OAM interaction and angular momentum exchange between Maxwell-Dirac fields. We elucidate how our results translate to classical electrodynamics using the example of plane wave interference as well as a dual-mode optical fiber. Our results shine light on phenomena related to the spin of gauge bosons.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2405.02143
- https://arxiv.org/pdf/2405.02143
- OA Status
- green
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4396784321
All OpenAlex metadata
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https://openalex.org/W4396784321Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2405.02143Digital Object Identifier
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New Angular Momentum Conservation Laws for Gauge Fields in QEDWork title
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preprintOpenAlex work type
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enPrimary language
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2024Year of publication
- Publication date
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2024-05-03Full publication date if available
- Authors
-
Farhad Khosravi, Li‐Ping Yang, Pronoy Das, Zubin JacobList of authors in order
- Landing page
-
https://arxiv.org/abs/2405.02143Publisher landing page
- PDF URL
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https://arxiv.org/pdf/2405.02143Direct link to full text PDF
- Open access
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YesWhether a free full text is available
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greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2405.02143Direct OA link when available
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Conservation law, Angular momentum, Physics, Gauge (firearms), Quantum electrodynamics, Momentum (technical analysis), Classical mechanics, Law, Theoretical physics, Quantum mechanics, Political science, Economics, Geography, Archaeology, FinanceTop concepts (fields/topics) attached by OpenAlex
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0Total citation count in OpenAlex
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10Other works algorithmically related by OpenAlex
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