We propose a microscopic theory for the Aharonov–Bohm oscillations, observed by Latyshev &etal; in the magnetotransport experiment inNbSe3with a charge density wave (CDW). The CDW slides across an array of columnar defects in a high magnetic field. For the charge carrying quanta of CDW these defects are elementary solenoids carrying a magnetic flux. The quantum CDW current acquires a component oscillating with the flux, with the periodhc/2e.Its magnitude is proportional to the concentration of columnar defects. The lower limit to the phase breaking length for these oscillations is set by the minimal Lee–Rice coherence length. ©1998 American Institute of Physics.