Results 31 to 40 of about 2,890,960 (258)
Frontiers in Chemistry, 2021 By means of highly accurate ab initio calculations, we identify two excellent ultracold molecular candidates from group VA hydrides. We find that NH and PH are suitable for the production of ultracold molecules, and the feasibility and advantage of two ...
Donghui Li +3 more
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Development of laser welding of high strength aluminium alloy 2024-T4 with controlled thermal cycle [PDF]
MATEC Web of Conferences, 2020 An innovative process design, to avoid thermal degradation during autogenous fusion welding of high strength AA 2024-T4 alloy, based on laser beam welding, is being developed. A series of instrumented laser welds in 2 mm thick AA 2024-T4 alloys were made
Demirorer Mete +4 more
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Laser cooling in a silica optical fiber at atmospheric pressure.
Optics Letters, 2020 For the first time, to the best of our knowledge, laser cooling is reported in a silica optical fiber. The fiber has a 21-µm diameter core doped with 2.06 wt.% ${{\rm Yb}^{3 + }}$Yb3+ and co-doped with ${{\rm Al}_2}{{\rm O}_3}$Al2O3 and ${{\rm F}^ - }$F-
J. Knall +7 more
semanticscholar +1 more source
IEEE Photonics Journal, 2021 Mode instability (MI) has become a major factor that restricts the brightness enhancement of fiber laser. This paper studies the MI threshold characteristics of the fiber oscillators with refrigerated ytterbium-doped fiber (YDF).
Jinming Wu +9 more
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Laser cooling of optically trapped molecules [PDF]
Nature Physics, 2018 Ultracold molecules are ideal platforms for many important applications, ranging from quantum simulation1–5 and quantum information processing 6,7 to precision tests of fundamental physics2,8–11. Producing trapped, dense samples of ultracold molecules is
L. Anderegg +6 more
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Experimental comparison of silica fibers for laser cooling.
Optics Letters, 2020 Laser cooling in silica has recently been demonstrated, but there is still a lack of understanding on how fiber composition, core size, and OH- contamination influence cooling performance.
J. Knall +5 more
semanticscholar +1 more source
Direct Laser Cooling to Bose-Einstein Condensation in a Dipole Trap. [PDF]
Physical Review Letters, 2019 We present a method for producing three-dimensional Bose-Einstein condensates using only laser cooling. The phase transition to condensation is crossed with 2.5×10^{4} ^{87}Rb atoms at a temperature of T_{c}=0.6 μK after 1.4 s of cooling.
A. Urvoy +4 more
semanticscholar +1 more source
Laser Cooling of Nuclear Magnons
Physical Review Letters, 2023 13 pages, 3 ...
Haowei Xu +7 more
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New Journal of Physics, 2013 Laser cooling of molecules employing broadband optical pumping involves a timescale separation between laser excitation and spontaneous emission. Here, we optimize the optical pumping step using shaped laser pulses. We derive two optimization functionals
Daniel M Reich, Christiane P Koch
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Frontiers in Chemistry, 2020 The feasibility of direct laser cooling of SiH, GeH, SnH, and PbH is investigated and assessed based upon first principles. The internally contracted multi-reference configuration interaction method with the Davidson correction is applied.
Donghui Li +7 more
doaj +1 more source