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The momentum distribution function for the two-component 1D gases of bosonsand fermions is studied in the limit of strong interatomic repulsion. Apronounced reconstruction of the distribution is found at a temperature muchsmaller than the Fermi temperature. This new temperature scale, which equalsthe Fermi temperature divided by the dimensionless coupling strength, is afeature of the two-component model and does not exist in the one-componentcase. We estimate the parameters relevant for the experimental observation ofthe crossover effect.Comment: 6 pages, 2 figure

Low-temperature crossover in the momentum distribution of cold atomic gases in one dimension