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Quantum optics with cold atoms

E. Giacobino, Jean-Michel Courty, Claude Fabre +2 more

Springer eBooksDec 4, 20070 citations

Concept for motion sensing using atomic optical memories

Arash Ahmadi, Yağız Murat, Özgür Esat Müstecaplıoğlu +3 more

Abstract By harnessing optical memories based on electromagnetically induced transparency in warm vapors of gaseous alkali metals and cold atomic clouds, this article presents new methods for motion sensing. The proposed scheme for velocimetry can substantially increase the sensitivity of some recent works based on the light-dragging effect in a moving medium, and on the other hand, our proposal, when realized using cold atoms, opens new research questions with regard to limits of light storage in cold atomic clouds. Ultimately, a detailed experimental setup is presented for the realization of the velocimetry scheme using stopped light, which includes considerations for the choice of the medium, laser configuration and control. By investigating the limits of optical memories in motion sensing applications, this research opens up new avenues for employing optical memories beyond applications in quantum information science.Abstract By harnessing optical memories based on electromagnetically induced transparency in warm vapors of gaseous alkali metals and cold atomic clouds, this article presents new methods for motion sensing. The proposed scheme for velocimetry can substantially increase the sensitivity of some recent works based on the light-dragging effect in a moving medium, and on the other hand, our proposal, when realized using cold atoms, opens new research questions with regard to limits of light storage in cold atomic clouds. Ultimately, a detailed experimental setup is presented for the realization of the velocimetry scheme using stopped light, which includes considerations for the choice of the medium, laser configuration and control. By investigating the limits of optical memories in motion sensing applications, this research opens up new avenues for employing optical memories beyond applications in quantum information science.

Research Directions Quantum TechnologiesDec 13, 20243 citations

Guiding of cold atoms through photonic crystal fibers

S. Vorrath, Sönke Möller, Kai Bongs +1 more

We have demonstrated that a two-dimensional photonic crystal fiber can be used as a novel nonlinear medium for atom optical experiments. Our results show for the first time that cold atoms can be guided optically through this fiber with high efficiency and especially with a high density. In order to study this system a new experiment for creating cold optically guided atoms has been built up. Our results show that the experimental parameters governing the atomic flux are in a good agreement with a self-developed numerical model as well as with other theoretical predictions.We have demonstrated that a two-dimensional photonic crystal fiber can be used as a novel nonlinear medium for atom optical experiments. Our results show for the first time that cold atoms can be guided optically through this fiber with high efficiency and especially with a high density. In order to study this system a new experiment for creating cold optically guided atoms has been built up. Our results show that the experimental parameters governing the atomic flux are in a good agreement with a self-developed numerical model as well as with other theoretical predictions.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)Jun 1, 20090 citations

Quantum Nonlinear Optics with Cold Atoms

Shengwang Du

Jan 1, 20090 citations

Cold-Atom Quantum Optical Sources

Shengwang Du

Jan 1, 20060 citations

Cold atom ring laser

Balázs Megyeri

This thesis will describe a cold atom ring laser that uses a cloud of magneto-optically trapped potassium atoms as a gain medium and a ring cavity for feedback. Some upgrades to the experiment were necessary, which include a new imaging axis in the vacuum system, a new atom source, alignment of some new optics and detectors to measure the powers and transverse intensity profiles of both counterpropagating cavity modes, and a new tapered amplifier for the magneto-optical trapping beams. The lasing threshold, gain mechanism, intensity correlations, and lasing into the two counterpropagating cavity modes were investigated. The results showed several transverse patterns at the lasing outputs, a threshold as a function of atom number, Mollow gain, a at second-order coherence above threshold, clearly distinguishable from that of fluorescence, nonreciprocity of the TEM\\(_{00}\\) transverse mode as a function of cavity length, and anticorrelated counterpropagating modes.This thesis will describe a cold atom ring laser that uses a cloud of magneto-optically trapped potassium atoms as a gain medium and a ring cavity for feedback. Some upgrades to the experiment were necessary, which include a new imaging axis in the vacuum system, a new atom source, alignment of some new optics and detectors to measure the powers and transverse intensity profiles of both counterpropagating cavity modes, and a new tapered amplifier for the magneto-optical trapping beams. The lasing threshold, gain mechanism, intensity correlations, and lasing into the two counterpropagating cavity modes were investigated. The results showed several transverse patterns at the lasing outputs, a threshold as a function of atom number, Mollow gain, a at second-order coherence above threshold, clearly distinguishable from that of fluorescence, nonreciprocity of the TEM\\(_{00}\\) transverse mode as a function of cavity length, and anticorrelated counterpropagating modes.

Jul 11, 20190 citations

Cold atoms: A new medium for quantum optics

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