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A110818
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Coefficient (times -1) of the 1/r^(2n) term in the radial far-field expansion of the squared amplitude of a unit topological point charge (-1 or +1 vortex) in the two-dimensional Ginzburg-Landau equation.
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1
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1, 2, 19, 374, 12559, 645992, 47367124, 4701142286, 607384076311, 99104140036610, 19933965307701547, 4846421980399770152, 1401149529610562030404, 475128611089824908724944, 186768400411319414544569368, 84248002219370115308687582078
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OFFSET
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1,2
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COMMENTS
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Ginzburg-Landau vortex solutions are fundamental in the study of superconductors and superfluids.
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LINKS
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EXAMPLE
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a(3) = 19 because A(r)^2 = 1 - 1/r^2 - 2/r^4 - 19/r^6 - ...
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MATHEMATICA
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n = 17;
v = 1; (* change to 2 to get A111100 *)
sol = AsymptoticDSolveValue[{4 z^3 f''[z] + 4 z^2 f'[z] - f[z] v^2 z + (1 - f[z]^2) f[z] == 0, f[0] == 1}, f[z], {z, 0, n}];
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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