Origin of the geometric forces accompanying Berrys geometric potentials

Yakir Aharonov*, Ady Stern

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We consider the dynamics of a particle carrying a magnetic moment in a strong magnetic field whose direction varies slowly in space. In particular, we discuss the geometric Lorentz-type and electric-type forces that were discovered in studies of Berrys phase. We show that the Lorentz-type force felt by the particle is caused by a small misalignment of the magnetic moment with respect to the magnetic field while the electric-type force is the time average of a strong oscillatory force induced by the precession of the magnetic moment.

Original languageEnglish
Pages (from-to)3593-3597
Number of pages5
JournalPhysical Review Letters
Issue number25
StatePublished - 1992


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