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Atomic coherence

About: Atomic coherence is a research topic. Over the lifetime, 877 publications have been published within this topic receiving 29395 citations.


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01 Jan 2010
TL;DR: Li et al. as mentioned in this paper demonstrated coherent control over transmission, spatial distribution and noise feature of the laser field interacting with coherent media, which can be used to manipulate some of the properties of laser field.
Abstract: Coherent Control of Laser Field and Spectroscopy in Dense Atomic Vapor. (May 2010) Hebin Li, B.S., Wuhan University, China Chair of Advisory Committee: Dr. Marlan O. Scully Coherent effects are studied in a dense atomic vapor driven by laser fields. With optical properties dramatically modified by these effects, the medium can be used to manipulate some of the properties of laser field. Our experiments demonstrate the coherent control over transmission, spatial distribution and noise feature of the laser field interacting with coherent media. The results have potential applications in the field such as precision metrology, precision spectroscopy, optical imaging and lithography. We develop an experiment to investigate the atomic excitation by few-cycle radio frequency (RF) pulses interacting with Zeeman sublevels. The system provides the flexibility to fully control all parameters of RF pulses. Such a flexibility can not be achieved in optical domain. Based on this system, experiments can be conducted to simulate processes in ultra-short laser physics. In particular, we study the carrierenvelope effect of few-cycle pulses and the strong off-resonant excitation by short pulses. We also discuss the selective reflection spectrum on a highly dense atomic vapor in which the dipole-dipole interaction can not be neglected. The spectrum broadening due to dipole-dipole interaction is much broader than the Doppler broadening. Our experiments show that the excitation by a pump laser can reduce the dipole-dipole interaction, thus reduce the broadening and improve the spectral resolution. The excitation dependence is studied at various atomic densities.

1 citations

Journal ArticleDOI
01 Nov 2013-Optik
TL;DR: In this paper, the authors theoretically study coherent control of optical precursors via active Raman gain (ARG) in an N-type warm atomic system, where the main fields are advanced due to fast-light effect and constructively interference with optical pre-processors.

1 citations

Journal ArticleDOI
01 Dec 2015-Optik
TL;DR: In this article, the Doppler-free absorptive lineshape and its physical parameters are analyzed for an open λ-type coherently prepared drive-probe system.

1 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the time evolution of the atomic dipole squeezing parameters of a Λ-type three-level atom interacting with a single-mode coherent optical field.
Abstract: By using the full quantum theory, we investigate the time evolution of the atomic dipole squeezing parameters of a Λ-type three-level atom interacting with a single-mode coherent optical field, and study the influence of the initial coherent-field intensity, the initial atomic coherence, the initial populations and energy splitting of the two lower atomic levels on the atomic dipole squeezing. The influence of a classical external driving field coupling to the atom on the atomic dipole squeezing is also explored at the end of the paper.

1 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the continuous variable entanglement in a four-level atom according to the criterion proposed by Duan et al. The atomic coherence was introduced using two external classical driving fields.
Abstract: We investigate the continuous variable entanglement in a four-level atom according to the criterion proposed by Duan et al. [Phys. Rev. Lett. 84 (2000) 2722]. The atomic coherence is introduced using two external classical driving fields. We study the steady-state entanglement of the system in the presence of losses, concluding that the creation of entangled states can be achievable under certain conditions.

1 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20235
202222
202121
202024
201923
201825