Time- and frequency-dependent correlatio
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J.H.H. Perk; H.W. Capel
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Article
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1980
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Elsevier Science
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English
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Explicit expressions are derived for the time correlations between x-and y-components of spins and their frequency-Fourier transforms in the one-dimensional XY-model in the hightemperature limit (/3 = 0). The results can be expressed as a linear combination of at most three Gaussians multiplied with