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| Titel |
Collisionless reconnection: magnetic field line interaction |
| VerfasserIn |
R. A. Treumann, W. Baumjohann, W. D. Gonzalez |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 30, no. 10 ; Nr. 30, no. 10 (2012-10-09), S.1515-1528 |
| Datensatznummer |
250017280
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| Publikation (Nr.) |
 copernicus.org/angeo-30-1515-2012.pdf |
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| Zusammenfassung |
| Magnetic field lines are quantum objects carrying one quantum
Φ0 = 2πh/e of magnetic flux and have finite radius λm.
Here we argue that they possess a very specific dynamical interaction.
Parallel field lines reject each other. When confined to a certain area they
form two-dimensional lattices of hexagonal structure. We estimate the filling
factor of such an area. Anti-parallel field lines, on the other hand, attract
each other. We identify the physical mechanism as being due to the action of
the gauge potential field, which we determine quantum mechanically for two
parallel and two anti-parallel field lines. The distortion of the quantum
electrodynamic vacuum causes a cloud of virtual pairs. We calculate the
virtual pair production rate from quantum electrodynamics and estimate the
virtual pair cloud density, pair current and Lorentz force density acting on
the field lines via the pair cloud. These properties of field line dynamics
become important in collisionless reconnection, consistently explaining why
and how reconnection can spontaneously set on in the field-free centre of a
current sheet below the electron-inertial scale. |
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