Topic
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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TL;DR: By numerically solving the density matrix equations, the laser frequency ramping method by means of position-dependent Zeeman splitting can efficiently polarize nuclear spin of atoms/ions in an accelerator beamline as discussed by the authors.
Abstract: By numerically solving the density matrix equations, we show that the laser frequency ramping method by means of position-dependent Zeeman splitting can efficiently polarize nuclear spin of atoms/ions in an accelerator beamline. This minimizes a quantum phenomenon, coherent population trapping, which limits the optical pumping efficiency in the polarized beamline for radioactive nuclear spin polarization. We consider the Li8 atomic system interacting with two circularly polarized laser beams in the presence of time-dependent magnetic field. From numerical results, we find that optimum frequency ramping allows efficient optical pumping for a short interaction time, e.g., 2 μs.
2 citations
TL;DR: In this paper, the feasibility of transfer of atomic coherence via stimulated Raman adiabatic passage (STIRAP) was examined and the necessary conditions for the sequence of laser pulses were derived.
2 citations
TL;DR: In this paper, the first experimental realization of an atom-light interface based on four-photon Raman interaction was reported, where light resonant to excited state transition and ground-state atomic coherence using a single warm atomic ensemble.
Abstract: We report first experimental realization of an atom-light interface based on four-photon Raman interaction. We are able to couple light resonant to excited state transition and ground-state atomic coherence using a single warm atomic ensemble
2 citations
TL;DR: In this paper, a four level atom-field configuration is used to investigate the coherent control of Casimir force between two identical plates made up of chiral atomic media and separated by a vacuum of width d.
Abstract: A four level atom-field configuration is used to investigate the coherent control of
Casimir force between two identical plates made up of chiral atomic media and separated by
vacuum of width d. The electromagnetic chirality-induced negative
refraction is obtained via atomic coherence. The behavior of Casimir force is investigated
using Casimir-Lifshitz formula. It is noticed that Casimir force can be switched from
repulsive to attractive and vice versa via coherent control of the driving field. This
switching feature provides new possibilities of using the repulsive Casimir force in the
development of new emerging technologies, such as, micro-electro-mechanical and
nano-electro-mechanical systems, i.e., MEMS and NEMS, respectively.
2 citations
TL;DR: A noninversion laser system which is closed lifetime broadened and free of the restriction on atomic decay rates is proposed, but the Rabi frequency of the applied field must exceed a lower threshold for the realization of lasing without inversion.
Abstract: A noninversion laser system which is closed lifetime broadened and free of the restriction on atomic decay rates is proposed. For the realization of lasing without inversion, the Rabi frequency of the applied field must exceed a lower threshold. Moreover, the coherence term in dressed states must enhance the gain. These results are obtained beyond the specific approximations
2 citations