Two-dimensional atom localization in a four-level tripod system in laser fields

Ivanov, V.; Rozhdestvensky, Yu.

doi:10.1103/physreva.81.033809

Cited by 141 publications

(101 citation statements)

References 24 publications

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“…[41] by application of two orthogonal standing-wave fields. Ivanov and Rozhdestvensky [42] proposed a four-level tripod system for 2D atom localization by measuring the population of the atom in two standing-wave fields based on EIT. Afterward, Wan et al proposed a scheme for 2D atom localization via quantum interference in a coherently driven inverted-Y atomic system [43] or via controlled spontaneous emission from a driven tripod system [44].…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional atom localization via spontaneous emission in a coherently driven five-level M-type atomic system

et al. 2011

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A scheme is proposed for two-dimensional atom localization in the subwavelength domain via controlled spontaneous emission. We consider a five-level M-type atomic system interacting with two orthogonal standingwave laser fields and the vacuum of the radiation field. The interaction of the atom with space-dependent standing-wave fields can provide information about the position of the atom passing through, thus leading to atom localization. It is found that the localization is significantly improved due to the interference effect between the spontaneous decay channels and the dynamically induced quantum interference generated by the two standing-wave fields. By properly varying the system parameters, we can achieve high-precision and high-resolution atom localization.

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Section: Introductionmentioning

confidence: 99%

Two-dimensional atom localization via spontaneous emission in a coherently driven five-level M-type atomic system

et al. 2011

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“…2d, when we set B = p = 60γ , the localization peak with a craterlike pattern in quadrant III evolves into a spikelike pattern and the atom is located at the position (kx, ky) = (−π/2, −π/2). In such condition, the probability of finding the atom in one period of the standing waves is 100 %, which is increased by a factor of 2 or 4 compared with the previous schemes [30][31][32][33]. Therefore, the detuning of the coherent magnetic fields plays an important role in the enhancement of the precision of atom localization.…”

Section: Numerical Results and Discussionmentioning

confidence: 90%

“…On the other hand, the behaviors of two-dimensional (2D) atom localization in multi-level atomic systems also have been studied in recent years because of its unique properties and extensive applications. 2D atom localization can be obtained via the measurement of the upper state or any ground state population [30], via interacting double-dark resonances [31], via controlled spontaneous emission [32,33] or via the probe absorption and gain [34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Efficient two-dimensional atom localization via an external coherent magnetic field

Shui

Wang

2014

Quantum Inf Process

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Objective The primary objective of this study was to investigate the twodimensional (2D) atom localization via a coherent magnetic field in a closed three-level atomic system. Introduction Two-dimensional (2D) atom localization in multi-level atomic systems has been studied in recent years because of its unique properties and extensive applications. However, to the best of our knowledge, no further theoretical or experimental work has been carried out to study such 2D atom localization in a closed three-level atomic system in the presence of the coherent magnetic field that motivates the current work. Methods As for 2D atom localization, the conditional position probability distribution, i.e., the probability of finding the atom at the position in the two orthogonal standing-wave fields when the atom is found in its internal excited state. In this paper, 2D atom localization is obtained via measuring the population in the excited state, which is solved via the density-matrix equations in dipole and rotating-wave approximations. Results Results The precision and spatial resolution of the 2D atom localization are improved via properly adjusting the controllable parameters of the system such as the detunings and intensities of the corresponding applied fields as well as the collective phase of the probe and standing-wave fields. Conclusions Due to the position-dependent atom-field interaction, the position information of the atom in the standing-wave fields can be obtained by means of the phase-sensitive excited state population. More importantly, the maximal probability of finding an atom within the sub-half-wavelength domain of the standing waves can reach 100 %. Thus, our scheme may be helpful in observing precision quantum measurement and computation for quantum information processing.

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“…Apart from the above-mentioned 1D atom localization, some schemes have been put forward for two-dimensional (2D) atom localization by applying two orthogonal standing-wave laser fields. For instance, a scheme for 2D atom localization was proposed by Ivanov and Rozhdestvensky using the measurement of the population in the upper state or in any ground state in a four-level tripod system [26]. Subsequently, related 2D localization schemes [27][28][29][30][31][32][33] have been studied by Wan, Ding, Qamar, and their coworkers via controlled spontaneous emission, probe absorption and gain, and interacting double-dark resonances, and Raman-driven coherence.…”

Section: Introductionmentioning

confidence: 98%

Precision localization of single atom via spontaneous emission in three dimensions

Wang

2015

Quantum Inf Process

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We present a new scheme for high-efficiency three-dimensional (3D) atom localization in a three-level atomic system via spontaneous emission. Owing to the space-dependent atom-field interaction, the position probability distribution of the atom can be directly determined by measuring the spontaneous emission. It is found that, by properly varying the parameters of the system, the probability of finding the atom at a particular position can be almost 100 %. Our scheme opens a promising way to achieve high-precision and high-efficiency 3D atom localization, which provides some potential applications to spatially selective single-qubit phase gate, entangling gates, and quantum error correction for quantum information processing.

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Two-dimensional atom localization in a four-level tripod system in laser fields

Cited by 141 publications

References 24 publications

Two-dimensional atom localization via spontaneous emission in a coherently driven five-level M-type atomic system

Two-dimensional atom localization via spontaneous emission in a coherently driven five-level M-type atomic system

Efficient two-dimensional atom localization via an external coherent magnetic field

Precision localization of single atom via spontaneous emission in three dimensions

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