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Author: search.filters.author.Sarkar, SudiptaSubject: search.filters.subject.Casimir effect

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    Casimir effect confronts cosmological constant
    (Elsevier Science Publishers, 2006-08-23) Mahajan, Gaurang; Sarkar, Sudipta; Padmanabhan, T.
    It has been speculated that the zero-point energy of the vacuum, regularized due to the existence of a suitable ultraviolet cut-off scale, could be the source of the on-vanishing cosmological constant that is driving the present acceleration of the universe. We show that the presence of such a cut-off can significantly alter the results for the Casimir force between parallel conducting plates and even lead to repulsive Casimir force when the plate separation is smaller than the cut-off scale length. Using the current experimental data we rule out the possibility that the observed cosmological constant arises from the zero-point energy which is made finite by a suitable cut-off. Any such cut-off which is consistent with the observed Casimir effect will lead to an energy density which is at least about 10¹² times larger than the observed one, if gravity couples to these modes. The implications are discussed.