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    Title: Stress-energy tensor correlators of a quantum field in Euclidean R^N and AdS^N spaces via the generalized zeta-function method
    Authors: Cho, H. T.;Hu, B. L.
    Contributors: 淡江大學物理學系
    Date: 2011-08-09
    Issue Date: 2013-02-25 12:28:51 (UTC+8)
    Publisher: College Park: American Physical Society
    Abstract: In this paper we calculate the vacuum expectation values of the stress-energy bitensor of a massive quantum scalar field with general coupling to N-dimensional Euclidean spaces and hyperbolic spaces which are Euclidean sections of the anti-de Sitter spaces. These correlators, also known as the noise kernel, act as sources in the Einstein-Langevin equations of stochastic gravity [B. L. Hu and E. Verdaguer Living Rev. Relativity 11 3 (2008)][B. L. Hu and E. Verdaguer Classical Quantum Gravity 20 R1 (2003)] which govern the induced metric fluctuations beyond the mean-field dynamics described by the semiclassical Einstein equations of semiclassical gravity. Because these spaces are maximally symmetric the eigenmodes have analytic expressions which facilitate the computation of the zeta function [J. S. Dowker and R. Critchley Phys. Rev. D 13 224 (1976) J. S. Dowker and R. Critchley Phys. Rev. D 13 3224 (1976)][S. W. Hawking Commun. Math. Phys. 55 133 (1977)]. Upon taking the second functional variation of the generalized zeta function introduced in [N. G. Phillips and B. L. Hu Phys. Rev. D 55 6123 (1997)] we obtain the correlators of the stress tensor for these two classes of spacetimes. Both the short and the large geodesic distance limits of the correlators are presented for dimensions up to 11. We mention current research problems in early universe cosmology, black hole physics and gravity-fluid duality where these results can be usefully applied to.
    Relation: Physical Review D 84(4), 044032(18pages)
    DOI: 10.1103/PhysRevD.84.044032
    Appears in Collections:[物理學系暨研究所] 期刊論文

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