Angular momentum and the electromagnetic top

The electric charge–magnetic dipole interaction is considered. If Γ em is the electromagnetic and Γ mech the mechanical angular momentum, the conservation law for the total angular momentum Γ tot holds: Γ tot =Γ em +Γ mech = const., but when the dipole moment varies with time, Γ mech is not conserve...

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Bibliographic Details
Published in:Pramāṇa 2016-08, Vol.87 (2), Article 19
Main Authors: SPAVIERI, GIANFRANCO, GILLIES, GEORGE T
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Astroparticles
Observations and Techniques
Physics
Physics and Astronomy
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Summary:The electric charge–magnetic dipole interaction is considered. If Γ em is the electromagnetic and Γ mech the mechanical angular momentum, the conservation law for the total angular momentum Γ tot holds: Γ tot =Γ em +Γ mech = const., but when the dipole moment varies with time, Γ mech is not conserved. We show that the non-conserved Γ mech of such a macroscopic isolated system might be experimentally observable. With advanced technology, the strength of the interaction hints to the possibility of novel applications for gyroscopes, such as the electromagnetic top.
ISSN:0304-4289
0973-7111
DOI:10.1007/s12043-016-1219-5