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We report on a general method for the rapid production of quantum degenerategases. Using 174Yb, we achieve an experimental cycle time as low as (1.6-1.8) sfor the production of Bose-Einstein condensates (BECs) of (0.5-1) x 10^5 atoms.While laser cooling to 30\muK proceeds in a standard way, evaporative coolingis highly optimized by performing it in an optical trap that is dynamicallyshaped by utilizing the time-averaged potential of a single laser beam movingrapidly in one dimension. We also produce large (>10^6) atom number BECs andsuccessfully model the evaporation dynamics over more than three orders ofmagnitude in phase space density. Our method provides a simple and generalapproach to solving the problem of long production times of quantum degenerategases.

Rapid Cooling to Quantum Degeneracy in Dynamically Shaped Atom Traps