Summary
The distribution density of zeros (i.e. the number of zeros per unit interval) of spherical Bessel functionsj L (x) of large orderL is shown to be\({}_{\rho L}(x) = \pi ^{ - 1} (1 - (L + 1/2)^2 /x^2 )^{1/2} \) for |x|>L+1/2. A similar analytical expression for the squares of the zeros is also found. As a byproduct, closed expressions of Rayleigh’s famous spectral sum rules are found.
Riassunto
Si mostra che la densità di distribuzione degli zeri (cioè il numero di zeri per intervallo unitario) delle funzioni di Bessel sferichej L (x) di grande ordineL è\({}_{\rho L}(x) = \pi ^{ - 1} (1 - (L + 1/2)^2 /x^2 )^{1/2} \) per |x|>L+1/2. Si trova anche un’espressione analitica simile per i quadrati degli zeri. Come derivati si trovano espressioni chiuse delle famose regole di somma spettrali di Rayleight.
Реэуме
покаэывается, что распределение плотности нулей (т.е. числа нулей в единичном интервале) сферических бесселевых функций]ь(х) для больщихь описывается выражением\({}_{\rho L}(x) = \pi ^{ - 1} (1 - (L + 1/2)^2 /x^2 )^{1/2} \) для |x| >L + 1/2. также определяется аналитическое выражение для квадратов нулей. выводится эамкнутое выражение для спектральных правил сумм рЭлея.
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References
LordRayleigh (J. W. Strutt):Sci. Pap.,6, 1, 444 (1920). See also p. 502 of ref. (4).
S. Flugge:Practical Quantum Mechanics (Springer-Verlag, Berlin, 1974).
A. Bohr andB. Mottelson:Nuclear Structure, Vol.2 (Benjamin, New York, N.Y., 1975).
G. N. Watson:A Treatise on the Theory of Bessel Functions, 2nd edition (Cambridge University Press, Cambridge, 1966).
F. W. J. Olver:Introduction to Asymptotics and Special Functions (Academic Press, New York, N.Y., 1974).
A. Laforgia andM. E. Muldoon:SIAM J. Math. Anal.,14, 383 (1983).
C. C. Grosjean:J. Comput. Appl. Math.,10, 355 (1984).
A. Cayley:Proc. London Math. Soc.,5, 123 (1874).
F. Calogero:Lett. Nuovo Cimento,20, 254, 476 (1977).
S. Ahmed andF. Calogero:Lett. Nuovo Cimento,21, 531 (1978).
K. M. Case:J. Math. Phys. (N.Y.),21, 709 (1980).
F. Steiner:Phys. Lett. B,159, 397 (1985).
S. Ahmed, M. Bruschi, F. Calogero, M. A. Olshanetsky andA. M. Perelomov:Nuovo Cimento B,49, 173 (1979).
S. Ahmed:J. Approx. Theory,34, 335 (1982).
S. Ahmed andM. E. Muldoon:SIAM (Soc. Ind. Appl. Math.) J. Math. Anal.,14, 372 (1983).
M. Abramowitz andI. A. Stegun:Handbook of Mathematical Functions (National Bureau of Standards, Washington, D.C., 1964).
N. Froman andP. O. Froman:JWKB Approximation. Contribution to the Theory (North Holland Pub. Co., Amsterdam, 1965).
R. E. Langer:Phys. Rev.,51, 669 (1937).
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Arriola, E.R., Dehesa, J.S. The distribution of zeros of spherical bessel functions. Nuov Cim B 103, 611–616 (1989). https://doi.org/10.1007/BF02753824
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DOI: https://doi.org/10.1007/BF02753824