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Quantum dynamic simulations for H2POSH demonstrate a novel approach to the conversion of a racemate into pure enantiomers by ultrashort laser pulses. A thermal distribution is considered such that only the lowest doublet of torsional states is equally populated, which is equivalent to equal densities of preoriented left and right enantiomers. A series of linearly polarized laser pulses then induce selective transitions which convert the racemate into the pure target enantiomer.

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