Aharonov-Casher effect

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In 1984, 25 years after the prediction of the ► Aharonov—Bohm (AB) effect, Aharonov and Casher [1] predicted a “dual” effect. In both effects, a particle is excluded from a tubular region of space, but otherwise no force acts on it. Yet it acquires a measurable quantum phase that depends on what is inside the tube of space from which it is excluded. In the AB effect, the particle is charged and the tube contains a magnetic flux. In the Aharonov—Casher (AC) effect, the particle is neutral, but has a magnetic moment, and the tube contains a line of charge. Experiments in neutron [2], vortex [3], atom [4], and electron [5] interferometry bear out the prediction of Aharonov and Casher. Here we briefly explain the logic of the AC effect and how it is dual to the AB effect.
Original languageEnglish
Title of host publicationCompendium of Quantum Physics Concepts, Experiments, History and Philosophy
Place of PublicationBerlin, Heidelberg
PublisherSpringer Berlin Heidelberg
Edition1st ed. 2009.
ISBN (Print)1-283-00370-8
StatePublished - 2009

Publication series

NameCompendium of Quantum Physics


  • Wave Packet
  • Relative Phase
  • Neutral Particle
  • Electron Wave Packet
  • Bohm Effect


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