Results 31 to 40 of about 12,596 (307)
Evolution of field line helicity in magnetic relaxation [PDF]
Physics of Plasmas, 2021 Plasma relaxation in the presence of an initially braided magnetic field can lead to self-organization into relaxed states that retain non-trivial magnetic structure. These relaxed states may be in conflict with the linear force-free fields predicted by the classical Taylor theory, and remain to be fully understood.
A. R. Yeates +2 more
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Electroweak baryogenesis via chiral gravitational waves
Physics Letters B, 2018 We propose a new mechanism for electroweak baryogenesis based on gravitational waves generated by helical magnetic fields that are present during a first order electroweak phase transition. We generate a net lepton number through the gravitational chiral
H. Abedi, M. Ahmadvand, S.S. Gousheh
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Hilltop Inflation and Generation of Helical Magnetic Field [PDF]
Universe, 2022 Primordial magnetic field generated in the inflationary era can act as a viable source for the present day intergalactic magnetic field of sufficient strength. We present a fundamental origin for such a primordial generation of the magnetic field, namely through anomaly cancellation of U(1) gauge field in quantum electrodynamics in the context of ...
Sumanta Chakraborty +2 more
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Inherent and Local Magnetic Field Structures in Jets from Active Galactic Nuclei
Galaxies, 2021 In theoretical models for the electromagnetic launching of astrophysical jets, a helical magnetic (B)-field component is generated through the winding up of an initial longitudinal field component by the rotation of the cental black hole and accretion ...
Denise C. Gabuzda
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Magnetic localization and control of helical robots for clearing superficial blood clots
APL Bioengineering, 2019 This work presents an approach for the localization and control of helical robots during removal of superficial blood clots inside in vitro and ex vivo models.
Islam S. M. Khalil +6 more
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Electric Currents along Astrophysical Jets
Galaxies, 2017 Astrophysical black holes and their surrounding accretion disks are believed to be threaded by grand design helical magnetic fields. There is strong theoretical evidence that the main driver of their winds and jets is the Lorentz force generated by these
Ioannis Contopoulos
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Swimming Characteristics of Bioinspired Helical Microswimmers Based on Soft Lotus-Root Fibers
Micromachines, 2017 Various kinds of helical swimmers inspired by E. coli bacteria have been developed continually in many types of researches, but most of them are proposed by the rigid bodies.
Jia Liu +5 more
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Searching for primordial helical magnetic fields [PDF]
Physical Review D, 2020 10 pages, 14 png figures; v2: improved quality of the figures, matches published ...
Kachelriess, M., Martinez, B. C.
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Independent Control and Path Planning of Microswimmers with a Uniform Magnetic Field
Advanced Intelligent Systems, 2022 Artificial bacteria flagella (ABFs) are magnetic helical microswimmers that can be remotely controlled via a uniform, rotating magnetic field. Previous studies have used the heterogeneous response of microswimmers to external magnetic fields for ...
Lucas Amoudruz, Petros Koumoutsakos
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Helical beams of electrons in a magnetic field: new analytic solutions of the Schrödinger and Dirac equations [PDF]
, 2023 Iwo Białynicki‐Birula +1 more
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