Sub-half-wavelength atom localization via bichromatic phase control of spontaneous emission

• DOI: 10.1016/j.physleta.2007.02.016
• Publication Date: 2007-02-10T12:13:30Z
• Authors: Jun Xu; Xiang-ming Hu
• Keywords: Phase control; Rabi frequency

Abstract We show that the bichromatic phase control of the spontaneous emission spectrum leads to the sub-half-wavelength atom localization. We consider a three-level Λ -type atom interacting with a bichromatic coupling field and a bichromatic probe field with equal frequency difference. One component of the bichromatic coupling field is a standing-wave field with position dependent Rabi frequency. When the spontaneous emitted photons are detected, the atom is localized in either of the two half-wavelength regions with 50% probability by the variation of the difference between the relative phases of the two bichromatic fields.