Abstract. We present a systematic study of the Λ-enhanced gray molasses cooling (Λ-GMC) of cesium atoms on the D2 transition. Due to the large splitting in the excited hyperfine transitions of ...
individual cesium atoms that are located less than 300 nm away from the surface of a solid at ambient temperature, close to their motional ground state. The atoms are trapped near the nanofiber part of a tapered opticalfiber usinga nanofiber-basedopticaldipoletrap[6]. We implement degenerate Raman cooling (DRC) [16–20],
VOLUME 81, NUMBER 26 PHYSICAL REVIEW LETTERS 28 DECEMBER 1998 Degenerate Raman Sideband Cooling of Trapped Cesium Atoms at Very High Atomic Densities Vladan Vuletic´, Cheng Chin, Andrew J. Kerman, and Steven Chu Department of Physics, Stanford University, Stanford, California 94305-4060 (Received 25 August …
For the trapped pre-cooled atoms in an optical dipole trap (ODT), the magic-wavelength ODT can eliminate the differential light shift of the transition between two atomic states, so that the transition frequency between the two states is the same as that of atoms in the free space, which is of great significance for improving the experimental repetition …
Researchers have trapped cesium atoms near a dielectric nanostructure before, but Goban et al. enhance existing trapping schemes by two techniques. First, the laser fields that form the atom trap are all operated at so-called "magic frequencies" that minimize distortions between ground and excited electronic levels for a trapped atom.
In this experiment cesium atoms in a low-pressure vapor were optically trapped. The trapped atoms were then cooled further and optically pumped into the 6S I F, mF) = 14, 0) state. Subsequently all light was switched off, permitting the atoms to fall in the dark under the force of gravity. As the atoms fell, two
Based on single Cesium atoms trapped in a 1064 nm microscopic optical trap we have exhibited a single qubit encoded in the Cesium "clock states". The single qubit initialization, detection and the ...
We develop a resolved Raman sideband cooling scheme that can efficiently prepare a single optically trapped cesium (Cs) atom in its motional ground states. A two-photon Raman process between two outermost Zeeman sublevels in a single hyperfine state is applied to reduce the phonon number. Our scheme is less sensitive to the …
We report observations of superradiance for atoms trapped in the near field of a photonic crystal waveguide (PCW). By fabricating the PCW with a band edge near the D 1 transition of atomic cesium, strong interaction is achieved between trapped atoms and guided-mode photons. Following short-pulse excitation, we record the decay of guided …
Abstract. We experimentally study the ground state coherence properties of cesium atoms in a nanofiber-based two-color dipole trap, localized ∼ 200 nm away from the fiber surface. Using microwave radiation to coherently drive the clock transition, we record Ramsey fringes as well as spin echo signals and infer a reversible dephasing …
Based on the multi-level model, we have calculated light shifts for Zeeman states of hyperfine levels of cesium (Cs) 6S 1/2 ground state and 6P 3/2 excited state. The magic-wavelength linearly-polarized optical dipole trap (ODT) for Cs 6S 1/2 |F = 4, m F = + 4ñ - 6P 3/2 |F ' = 5, m F = + 5ñ transition is experimentally constructed and …
Optical dipole trap (ODT) is becoming an important tool of manipulating neutral atoms. In this paper ODT is realized with a far-off resonant laser beam strongly focused in the …
We report the measurement of collision rate coefficient for collisions between ultracold Cs atoms and low energy Cs+ ions. The experiments are performed in a hybrid trap consisting of a magneto-optical trap (MOT) for Cs atoms and a Paul trap for Cs+ ions. The ion-atom collisions impart kinetic energy to the ultracold Cs atoms resulting in …
We demonstrate a simple scheme to achieve fast, accelerating (runaway) evaporative cooling of optically trapped atoms by tilting the optical potential with a magnetic field gradient. Runaway evaporation is possible in this trap geometry due to the weak dependence of vibration frequencies on trap depth, which preserves atomic …
Based on the multi-level model, we have calculated light shifts for Zeeman states of hyperfine levels of cesium (Cs) 6S1/2 ground state and 6P3/2 excited state.The magic-wavelength linearly-polarized optical dipole trap (ODT) for Cs 6S1/2 F=4, mF=+4 - 6P3/2 F'=5, mF=+5 transition is experimentally constructed and characterized by using …
In this experiment, 1.8x10'neutral cesium atoms were optically captured directly from a low-pressure vapor in a small glass cell. We then cooled the & 1-mm' cloud of trapped atoms and loaded it into a low-field magnetic trap in the same cell. The magnetically trapped atoms had an eAective temperature as low as 1.1+ 0.2 pK, which is the lowest ki-
The motion of individual cesium atoms trapped inside an optical resonator is revealed with the atom-cavity microscope (ACM). A single atom moving within the resonator generates large variations in ...
Coherence properties of nanofiber-trapped cesium atoms. We experimentally study the ground state coherence properties of cesium atoms in a nanofiber-based two-color dipole trap, localized 200 nm away from the fiber surface. Using microwave radiation to coherently drive the clock transition, we record Ramsey fringes …
Published in Physical Review Letters 2013. Coherence properties of nanofiber-trapped cesium atoms. D. Reitz C. Sayrin R. Mitsch P. Schneeweiss A. Rauschenbeutel. FIG. 1. a. Sketch of the experimental set-up including the tapered optical fiber, the trapping, probe and push-out laser fields, the microwave antenna, and the …
Up to 10^8 atoms are trapped to a density of 3 times 10^{10} atoms/cm ^3, and can be cooled to under 5 muK. As an example of the uses of trapped and cooled atoms, spectroscopy of the cesium "clock" transition is performed on optically trapped and cooled cesium atoms, yielding excellent fractional frequency resolution.
Next, we demonstrate our method by measuring the cesium 6S–7S TPS with optically trapped single cesium atoms. The laser wavelength to drive the 6S–7S two-photon transition is 1079.01 nm. In our experiment, the atom is first loaded from a magneto-optical trap (MOT) into a micro-sized dipole trap formed by a strongly focused 1079 nm …
Next, we demonstrate our method by measuring the cesium 6S–7S TPS with optically trapped single cesium atoms. The laser wavelength to drive the 6S–7S …
Researchers have trapped cesium atoms near a dielectric nanostructure before, but Goban et al. enhance existing trapping …
Abstract and Figures. We experimentally study the ground state coherence properties of cesium atoms in a nanofiber-based two-color dipole trap, localized 200 nm away from the fiber surface. Using ...
Single cesium atoms are cooled and trapped inside a small optical cavity by way of a novel far-off-resonance dipole-force trap, with observed lifetimes of 2-3 s. Trapped atoms are observed … Expand. 274 [PDF] Save. Measurement of Magic Wavelengths for the ^{40}Ca^{+} Clock Transition. Peiliang Liu Yao Huang +6 authors K. …
Measurement of magic-wavelength optical dipole trap by using the laser-induced fluorescence spectra of trapped single cesium atoms BEI LIU,1,2 GANG JIN,1,2 RUI SUN,1,2JUN HE,1,2,3 AND JUNMIN WANG 1,2,3,* 1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Tai Yuan 030006, Shan Xi …
and cesium (Cs) atoms trapped in up to 512 optical tweezers. We nd that the choice of Rb and Cs atoms enables independent loading, cooling, control, and mea-surement in the …
We experimentally study the ground state coherence properties of cesium atoms in a nanofiber-based two-color dipole trap, localized ∼ 200 nm away from the …
We developed a resolved Raman sideband cooling scheme that can efficiently prepare a single optically trapped cesium (Cs) atom in its motional ground states. A two-photon Raman process between two outermost Zeeman sublevels in a single hyperfine state is applied to reduce the phonon number. Our scheme is less sensitive to …
Based on single Cesium atoms trapped in a 1064 nm microscopic optical trap we have exhibited a single qubit encoded in the Cesium "clock states". The single qubit initialization, detection and the fast state rotation with high efficiencies are demonstrated and this state manipulation is crucial for quantum information processing. The ground …
Cesium atoms are trapped in the evanescent field surrounding the nanofiber-waist of a tapered optical fiber. The atoms are located about 200 nm above the nanofiber surface …
