Two-dimensional atom localization via Raman-driven coherence

• The article deals with precision position measurement of single atom in 2-dimensional space.
• Two orthogonal standing-waves are employed to localize the atom in 2-dimensional space.
• The coherence is induced in the system via two-photon Raman transition.
• Precision in position information is observed using detuning and phase shifts.
• The atomic system is in diamond configuration and experimentally more viable.

A scheme for two-dimensional (2D) atom localization via Raman-driven coherence in a four-level diamond-configuration system is suggested. The atom interacts with two orthogonal standing-wave fields where each standing-wave field is constructed from the superposition of the two-standing wave fields along the corresponding directions. Due to the position-dependent atom–field interaction, the frequency of the spontaneously emitted photon carries the position information about the atom. We investigate the effect of the detunings and phase shifts associated with standing-wave fields. Unique position information of the single atom is obtained by properly adjusting the system parameters. This is an extension of our previous proposal for one-dimensional atom localization via Raman-driven coherence [1].