Abstract
The actual location of an atom in three-dimensional (3D) space is described by spatial-dependent atom-field interaction, which has potential applications in many fields, including optical imaging techniques, 3D nanolithograghy, Bose–Einstein condensation, and dual-measurement of center-of-mass wave function. Here, we propose a scheme to realize single atom localization in 3D space based on double-channel interactions. By exploiting the property of the spontaneously emitted photon, high-precision 3D atom localization, such as sphere-like pattern, ellipsoid-like pattern, funnel-like pattern, and ring-like structure can be achieved. These localization phenomena are the consequence of the quantum interference among multiple decay pathways. Furthermore, we show that with the system parameters specifically tuned, a high degree of localization of atom is enabled in a sub-wavelength range. Different from other 3D schemes, our proposed system is more robust under the influence of double-channel interactions. Our findings could be instructive for understanding the localization mechanisms in such a system with competitive decay channels.
Published Version
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