Results 1 to 10 of about 10,575,338 (382)
Understanding the electromagnetic 4-potential in the tetrad bundle [PDF]
Phys.Rev.A.98,033809 (2018), 2018 Separation of the spin and orbital angular momenta of the electromagnetic field has been discussed frequently in recent years. The spin and orbital angular momenta cannot be made simultaneously gauge invariant and Lorentz covariant and are not conserved separately.
Hao, Yufang +2 more
arxiv +3 more sources
Electromagnetic Force on a Brane [PDF]
Class. Quantum Grav. 33 (2016) 225008, 2016 A fundamental assumption in the theory of brane world is that all matter and radiation are confined on the four-dimensional brane and only gravitons can propagate in the five-dimensional bulk spacetime. The brane world theory did not provide an explanation for the existence of electromagnetic fields and the origin of the electromagnetic field equation.
Li, Li-Xin
arxiv +3 more sources
The $ννγ$ Amplitude in an External Homogeneous Electromagnetic Field [PDF]
Phys.Rev. D62 (2000) 113005, 2000 Neutrino-photon interactions in the presence of an external homogeneous constant electromagnetic field are studied. The $\nu \nu \gamma $ amplitude is calculated in an electromagnetic field of the general type, when the two field invariants are nonzero.
A. A. Gvozdev +27 more
arxiv +3 more sources
The Electromagnetic Field and Curvature [PDF]
Proceedings of the National Academy of Sciences, 1923 G. Y. Rainich
openalex +5 more sources
Scientific Reports, 2021 We demonstrate halving the record-low loss of interconnection between a nested antiresonant nodeless type hollow-core fiber (NANF) and standard single-mode fiber (SMF).
Dmytro Suslov +9 more
doaj +1 more source
Standalone photovoltaic and battery microgrid design for rural areas
Energy Exploration & Exploitation, 2022 The remote location and many islands in Africa are experiencing a big power shortage and blackouts and they greatly necessitate electric power from standalone photovoltaic microgrid. In Rwanda, off-grid solar systems are at their infancy level and their
Cyprien Nsengimana +3 more
doaj +1 more source
Deep reflector prime focus feed for space communication
The Journal of Engineering, 2021 In this paper, design of a prime‐focus feed for a deep reflector, Earth–Moon–Earth space communication system is described. The feed is based on a circular waveguide equipped with two chokes in order to minimise sidelobes and illuminate the deep dish ...
Rastislav Galuscak +4 more
doaj +1 more source
TORSION AND THE ELECTROMAGNETIC FIELD [PDF]
International Journal of Modern Physics D, 1999 In the framework of the teleparallel equivalent of general relativity, we study the dynamics of a gravitationally coupled electromagnetic field. It is shown that the electromagnetic field is able not only to couple to torsion, but also, through its energy–momentum tensor, produce torsion.
De Andrade, V. C., Pereira, J. G.
openaire +4 more sources
Invariants of the electromagnetic field [PDF]
Journal of Mathematical Physics, 2014 We present a constructive proof that, in electrodynamics, all of the gauge-invariant Lorentz scalars and pseudoscalars can be expressed as functions of the quadratic ones.
Escobar, C. A., Urrutia, L. F.
openaire +4 more sources
Simultaneously realizing thermal and electromagnetic cloaking by multi-physical null medium [PDF]
Opto-Electronic Science Vol. 3 No. 2 230027, 2024, 2023 Simultaneously manipulating multiple physical fields plays an important role in the increasingly complex integrated systems, aerospace equipment, biochemical productions, etc. For on-chip systems with high integration level (e.g., electronic/photonic chips and radio-frequency/microwave circuits), where both electromagnetic information/energy ...
arxiv +1 more source