期刊
CLASSICAL AND QUANTUM GRAVITY
卷 21, 期 14, 页码 3379-3387出版社
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/21/14/004
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Optical activity of electromagnetic waves in a string inspired Kalb-Ramond cosmological background is studied in the presence of an extra spacetime dimension. The Kalb-Ramond-electromagnetic coupling, which originates from the gauge anomaly cancelling Chem-Simons term in a string inspired model, is explicitly calculated following the Randall-Sundrum braneworld conjecture. It is shown that the Randall-Sundrum scenario leads to an enormous enhancement of the optical rotation of a plane polarized electromagnetic wave propagating on the visible brane. The absence of any experimental support in favour of such a large rotation in astrophysical experiments on distant galactic radio waves indicates an apparent conflict between the Randall-Sundrum braneworld scenario and the presence of the Kalb-Ramond antisymmetric tensor field in the background spacetime.
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