Computation of Hyperspherical Bessel Functions. (6th July 2017)

• Record Type: Journal Article
• Authors: Tram, Thomas
• Is Part Of: Communications in computational physics. Volume 22:Number 3(2017:Sep.)
• Page Start: 852
• Page End: 862
• Publication Date: 2017-07-06
• Subjects: 65Q30, -- 65Z05; Hyperspherical Bessel functions, -- recurrence relations, -- WKB approximation, -- interpolation; Mathematical physics -- Data processing -- Periodicals; Physics -- Data processing -- Periodicals; 530.150285
• DOI: 10.4208/cicp.OA-2016-0071
• Languages: English
• ISSNs: 1815-2406

Abstract

Abstract: In this paper we present a fast and accurate numerical algorithm for the computation of hyperspherical Bessel functions of large order and real arguments. For the hyperspherical Bessel functions of closed type, no stable algorithm existed so far due to the lack of a backwards recurrence. We solved this problem by establishing a relation to Gegenbauer polynomials. All our algorithms are written in C and are publicly available at Github [https://github.com/lesgourg/class_public ]. A Python wrapper is available upon request.