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Articles by J Lim
An ultracold molecular beam for testing fundamental physics
We use two-dimensional transverse laser cooling to produce an ultracold beam of YbF molecules. Through experiments and numerical simulations, we study how the cooling is influenced by the polarization configuration, laser intensity, laser detuning and applied magnetic field. The ultracold part of the beam contains more than 2 × 105 molecules per shot and has a temperature below 200 μK, and the cooling yields a 300-fold increase in the brightness of the beam.
Restarting the engine: Asia, oil and coronavirus
THE novel coronavirus pandemic triggered a collapse in passenger transportation-related oil demand due to the enforcement of lockdowns, starting with China in late January and February and extending to the rest of the world in March and April, as countries around the world tried to mitigate the virus spread. A catastrophic economic deterioration ensued almost immediately after the lockdowns.
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