HOTB: High precision parallel code for calculation of four-particle harmonic oscillator transformation brackets |
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| Authors: | A Stepšys S Mickevicius D Germanas RK Kalinauskas |
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| Affiliation: | 1. Center for Physical Sciences and Technology, Savanoriu 231, LT-02300 Vilnius, Lithuania;2. Vytautas Magnus University, K. Donelaicio str. 58, LT-44248, Kaunas, Lithuania;3. Kaunas University of Technology, Physics Department, Studentu str. 50, LT-51368 Kaunas, Lithuania |
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| Abstract: | This new version of the HOTB program for calculation of the three and four particle harmonic oscillator transformation brackets provides some enhancements and corrections to the earlier version (Germanas et al., 2010) 1]. In particular, new version allows calculations of harmonic oscillator transformation brackets be performed in parallel using MPI parallel communication standard. Moreover, higher precision of intermediate calculations using GNU Quadruple Precision and arbitrary precision library FMLib 2] is done. A package of Fortran code is presented. Calculation time of large matrices can be significantly reduced using effective parallel code. Use of Higher Precision methods in intermediate calculations increases the stability of algorithms and extends the validity of used algorithms for larger input values. |
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| Keywords: | Mathematical methods in physics Algebraic methods Nuclear shell model |
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