Geodesic
Vacuum fluctuations in cosmological models with compactified dimensions
Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 1 (2010), pp. 47-53

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We study quantum effects of scalar fields in cosmological models of Friedman–Robertson–Walker with a power-low scale factor and spatial topology $R^p\times(S^1)^q$ . Recurrent formulae are obtained for positive-frequency Wightman function, vacuum expectation values of the field squared and energy density.
Keywords: cosmology, vacuum fluctuations, Kaluza–Klein theories. 
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     title = {Vacuum fluctuations in cosmological models with compactified dimensions},
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A. L. Mkhitaryan. Vacuum fluctuations in cosmological models with compactified dimensions. Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 1 (2010), pp. 47-53. http://geodesic.mathdoc.fr/item/UZERU_2010_1_a7/