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Communications in Theoretical Physics

Atom Microscopy via Dual Resonant Superposition

M S Abdul Jabar, Bakht Amin Bacha, M. Jalaluddin, Iftikhar Ahmad

Published Dec 1, 2015• 9 citations
Publisher

Abstract

Abstract An M-type Rb 87 atomic system is proposed for one-dimensional atom microscopy under the condition of Electromagnetically Induced Transparency. Super-localization of the atom in the absorption spectrum while its delocalization in the dispersion spectrum is observed due to the dual superposition effect of the resonant fields. The observed minimum uncertainty peaks will find important applications in Laser cooling, creating focused atom beams, atom nanolithography, and in measurement of the center-of-mass wave function of moving atoms.

DOI
10.1088/0253-6102/64/6/741

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Abstract An M-type Rb 87 atomic system is proposed for one-dimensional atom microscopy under the condition of Electromagnetically Induced Transparency. Super-localization of the atom in the absorption spectrum while its delocalization in the dispersion spectrum is observed due to the dual superposition effect of the resonant fields. The observed minimum uncertainty peaks will find important applications in Laser cooling, creating focused atom beams, atom nanolithography, and in measurement of the center-of-mass wave function of moving atoms.
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This paper introduces a method for achieving precise three-dimensional atomic microscopy within a three-level Λ-type configuration, utilizing a probe field and a standing-wave control field. The microscopy information is derived from the imaginary part of the effective susceptibility, which reveals the absorption spectrum. Applications of this approach to atomic microscopy are demonstrated for scenarios involving two atoms and interactions near boundary walls. The atomic positions are precisely controlled through parameters such as detunings (∆), field strengths (β1, p), decay rates (γa, b), and field phases (ϕ1y, ϕ1z). The theoretical findings presented in this study highlight the potential for significant advancements in applications such as laser cooling and nanolithography.
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We propose a scheme for high-precision two-dimensional (2D) sub-wavelength atom localization in a tripod-type atomic system. The position information of a moving atom can be obtained by measuring the probe field absorption when the atom interacts with a weak probe field and two orthogonal standing-wave fields. It is found that sub-wavelength atom localization can be obtained under the condition of two-photon resonance. Remarkably, the localization precision can be significantly improved by changing the strength of the coherent coupling fields in the presence of superposition of coherent coupling field and standing-wave field.