THE EXACT RENORMALIZATION GROUP IN ASTROPHYSICS
2001 ◽
Vol 16
(11)
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pp. 2041-2046
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Keyword(s):
The coarse-graining operation in hydrodynamics is equivalent to a change of scale which can be formalized as a renormalization group transformation. In particular, its application to the probability distribution of a self-gravitating fluid yields an "exact renormalization group equation" of Fokker-Planck type. Since the time evolution of that distribution can also be described by a Fokker-Planck equation, we propose a connection between both equations, that is, a connection between scale and time evolution. We finally remark on the essentially non-perturbative nature of astrophysical problems, which suggests that the exact renormalization group is the adequate tool for them.
2003 ◽
Vol 18
(05)
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pp. 767-809
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2002 ◽
Vol 17
(32)
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pp. 4871-4902
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1998 ◽
Vol 12
(12n13)
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pp. 1321-1341
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2004 ◽
Vol 332
(1-2)
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pp. 93-100
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2005 ◽
Vol 17
(20)
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pp. S1929-S1945
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2001 ◽
Vol 16
(11)
◽
pp. 2071-2074
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