Results 251 to 260 of about 90,157 (275)
Some of the next articles are maybe not open access.
Nature, 2005
The precision measurement of time and frequency is a prerequisite not only for fundamental science but also for technologies that support broadband communication networks and navigation with global positioning systems (GPS). The SI second is currently realized by the microwave transition of Cs atoms with a fractional uncertainty of 10(-15) (ref.
Masao, Takamoto +3 more
openaire +2 more sources
The precision measurement of time and frequency is a prerequisite not only for fundamental science but also for technologies that support broadband communication networks and navigation with global positioning systems (GPS). The SI second is currently realized by the microwave transition of Cs atoms with a fractional uncertainty of 10(-15) (ref.
Masao, Takamoto +3 more
openaire +2 more sources
International Quantum Electronics Conference, 2005., 2005
We report on the precision spectroscopy of the 5s/sup 2/ /sup 1/S/sub o/(F=9/2)-5s5p /sup 3/P/sub o/(F=9/2) clock transition of /sup 87/Sr atoms trapped in a one-dimensional optical lattice and discuss its prospects as a future optical clock.
M. Takamoto, H. Katori
openaire +2 more sources
We report on the precision spectroscopy of the 5s/sup 2/ /sup 1/S/sub o/(F=9/2)-5s5p /sup 3/P/sub o/(F=9/2) clock transition of /sup 87/Sr atoms trapped in a one-dimensional optical lattice and discuss its prospects as a future optical clock.
M. Takamoto, H. Katori
openaire +2 more sources
Optics Letters, 1996
We study a new type of optical lattice in which the localized atoms experience a much reduced optical pumping and fluorescence rate. An optical standing wave is tuned to the blue of the F = 2 ? F = 2 transition of the (87)Rb D(2) line and induces periodic optical potentials by coupling the F = 2 ground state to both the F = 2 and F = 3 excited states ...
T, Esslinger +5 more
openaire +2 more sources
We study a new type of optical lattice in which the localized atoms experience a much reduced optical pumping and fluorescence rate. An optical standing wave is tuned to the blue of the F = 2 ? F = 2 transition of the (87)Rb D(2) line and induces periodic optical potentials by coupling the F = 2 ground state to both the F = 2 and F = 3 excited states ...
T, Esslinger +5 more
openaire +2 more sources
Optics and Photonics News, 2015
A new breed of atomic clock—the “ticking” of which comes from transitions in millions of cooled atoms, trapped in optical standing waves created by tightly focused lasers—is pushing scientific timekeeping to previously unknown frontiers of precision.
Christopher W. Oates, Andrew D. Ludlow
openaire +1 more source
A new breed of atomic clock—the “ticking” of which comes from transitions in millions of cooled atoms, trapped in optical standing waves created by tightly focused lasers—is pushing scientific timekeeping to previously unknown frontiers of precision.
Christopher W. Oates, Andrew D. Ludlow
openaire +1 more source
Quasiperiodic Optical Lattices
Physical Review Letters, 1997We study the kinetic temperature and the localization of cesium atoms in a three dimensional quasiperiodic optical potential created by the interference of five or six laser beams. Bragg scattering experiments show evidence of a quasiperiodic order for the atomic density.
L. Guidoni +3 more
openaire +1 more source
Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion, 2007
We have spatially resolved ~250 single, neutral atoms in a 3D array. The atoms are trapped in a blue-detuned optical lattice, and can function as qubits in a quantum computer. Article not available.
David Weiss, Karl D. Nelson, Xiao Li
openaire +1 more source
We have spatially resolved ~250 single, neutral atoms in a 3D array. The atoms are trapped in a blue-detuned optical lattice, and can function as qubits in a quantum computer. Article not available.
David Weiss, Karl D. Nelson, Xiao Li
openaire +1 more source
Physical Review A, 2004
We propose a scheme that allows us to Fourier-synthesize arbitrarily shaped periodic potentials for atoms. The method is based on the dispersion connected with higher order multiphoton Raman processes, where a suitable combination of laser frequencies eliminates unwanted standing wave effects.
Martin Weitz +3 more
openaire +1 more source
We propose a scheme that allows us to Fourier-synthesize arbitrarily shaped periodic potentials for atoms. The method is based on the dispersion connected with higher order multiphoton Raman processes, where a suitable combination of laser frequencies eliminates unwanted standing wave effects.
Martin Weitz +3 more
openaire +1 more source
Proceedings of the 2005 IEEE International Frequency Control Symposium and Exposition, 2005., 2006
Atoms with narrow-linewidth transition trapped within the Lamb-Dick regime of optical lattice are proposed be used as laser gain medium to build a laser. The gain medium atoms can be the alkaline-earth species, Magnesium, Calcium, and Strontium, including Ytterbium.
null Jingbiao Chen, null Xuzong Chen
openaire +1 more source
Atoms with narrow-linewidth transition trapped within the Lamb-Dick regime of optical lattice are proposed be used as laser gain medium to build a laser. The gain medium atoms can be the alkaline-earth species, Magnesium, Calcium, and Strontium, including Ytterbium.
null Jingbiao Chen, null Xuzong Chen
openaire +1 more source
2005 Quantum Electronics and Laser Science Conference, 2005
We present a novel optical lattice of reduced periodicity that is based on Raman transitions. We demonstrate and characterize laser cooling in this lattice. Our observations are in agreement with theoretical results.
N.V. Morrow +3 more
openaire +1 more source
We present a novel optical lattice of reduced periodicity that is based on Raman transitions. We demonstrate and characterize laser cooling in this lattice. Our observations are in agreement with theoretical results.
N.V. Morrow +3 more
openaire +1 more source
Two-Dimensional Optical Lattice Solitons
Physical Review Letters, 2003We study various families of two-dimensional discrete or lattice solitons, and show that they are possible only when their power level exceeds a critical threshold. In addition, we show that gap-lattice solitons exist only when the lattice possesses a complete 2D band gap. Our results suggest that these conditions are universally valid, irrespective of
Nikolaos K, Efremidis +5 more
openaire +3 more sources