Field induced superposition effects on atom localization via resonance fluorescence spectrum

A driven two-level atomic system is exhaustively studied to explore the field-induced superposition effects in atom localization via resonance fluorescence spectroscopy. To this end, different field arrangements are incorporated as a combination of spatially aligned standing wave fields and traveling-wave field. Different localization patterns evolve with the variation in the resolution of localization for various parameter conditions. Particularly, multi-peak structures with the scope of decreasing localization peaks in one-dimension (1D) localization schemes both for sub-wavelength and sub-half-wavelength domains are interesting outcomes of sophisticated manipulation of field arrangements. Similar features are obtained for the two-dimension (2D) localization via suitable adjustment of control parameters. For both cases the strong impact of the traveling-wave field is noticeable as a controlling knob of localization behavior aiming at precision enhancement in position measurement of the single atom. The impact of discrete Lorentzians are also analyzed with a comparison of results obtained on the basis of exact analytic formalism as framed for the computation of resonance fluorescence spectrum. The proposed field configuration may be found suitable for application in the study of atom localization in an optical lattice arrangement.