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The AharonovâCasher effect is a quantum mechanical phenomenon predicted in 1984 by Yakir Aharonov and Aharon Casher, [1] in which a traveling magnetic dipole is affected by an electric field. It is dual to the AharonovâBohm effect, in which the quantum phase of a charged particle depends upon which side of a magnetic flux tube it comes through. In the AharonovâCasher effect, the particle has a magnetic moment and the tubes are charged instead. It was observed in a gravitational neutron interferometer in 1989 [2] and later by fluxon interference of magnetic vortices in Josephson junctions. [3] It has also been seen with electrons and atoms.
In both effects the particle acquires a phase shift () while traveling along some path P. In the AharonovâBohm effect it is
While for the AharonovâCasher effect it is
where is its charge and is the magnetic moment. The effects have been observed together. [4]
![]() | This article includes a
list of references,
related reading, or
external links, but its sources remain unclear because it lacks
inline citations. (November 2019) |
The AharonovâCasher effect is a quantum mechanical phenomenon predicted in 1984 by Yakir Aharonov and Aharon Casher, [1] in which a traveling magnetic dipole is affected by an electric field. It is dual to the AharonovâBohm effect, in which the quantum phase of a charged particle depends upon which side of a magnetic flux tube it comes through. In the AharonovâCasher effect, the particle has a magnetic moment and the tubes are charged instead. It was observed in a gravitational neutron interferometer in 1989 [2] and later by fluxon interference of magnetic vortices in Josephson junctions. [3] It has also been seen with electrons and atoms.
In both effects the particle acquires a phase shift () while traveling along some path P. In the AharonovâBohm effect it is
While for the AharonovâCasher effect it is
where is its charge and is the magnetic moment. The effects have been observed together. [4]