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Gravitational double layers
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DOI：10.1088/0264-9381/31/7/072002.png)
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摘要
En 中文
I analyze the properties of thin shells through which the scalar curvature R is discontinuous in gravity theories with Lagrangian F(R) = R - 2A + alpha R-2 on the bulk. These shells/domain walls are of a new kind because they possess, in addition to the standard energy-momentum tensor, an external energy flux vector, an external scalar pressure/tension and, most exotic of all, another energy-momentum contribution resembling classical dipole distributions on a shell: a double layer. I prove that all these contributions are necessary to make the entire energy-momentum tensor divergence-free. This is the first known occurrence of such a type of double layer in a gravity theory. I present explicit examples in constant-curvature five-dimensional bulks, with a brief study of their properties: new physical behaviors arise.
Keyword:
double layers
gravitational dipoles
shells/domain walls/braneworlds
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期刊
IF:
3.7
论文数:
1.3W
被引数:
3.0W
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