期刊
COMPUTER PHYSICS COMMUNICATIONS
卷 200, 期 -, 页码 406-410出版社
ELSEVIER
DOI: 10.1016/j.cpc.2015.11.014
关键词
Bose-Einstein condensate; Dipolar atoms; Gross-Pitaevskii equation; Split-step Crank-Nicolson scheme; Real- and imaginary-time propagation; C program; GPU; CUDA program; Partial differential equation
资金
- Ministry of Education, Science, and Technological Development of the Republic of Serbia [ON171017, III43007, ON174023]
- DAAD - German Academic and Exchange Service
- Science and Engineering Research Board, Department of Science and Technology, Government of India [EMR/2014/000644]
- CNPq of Brazil [303280/2014-0]
- FAPESP of Brazil [2012/00451-0]
In this paper we present new versions of previously published numerical programs for solving the dipolar Gross-Pitaevskii (GP) equation including the contact interaction in two and three spatial dimensions in imaginary and in real time, yielding both stationary and non-stationary solutions. New versions of programs were developed using CUDA toolkit and can make use of Nvidia GPU devices. The algorithm used is the same split-step semi-implicit Crank-Nicolson method as in the previous version (Kishor Kumar et al., 2015), which is here implemented as a series of CUDA kernels that compute the solution on the GPU. In addition, the Fast Fourier Transform (FFT) library used in the previous version is replaced by cuFFT library, which works on CUDA-enabled GPUs. We present speedup test results obtained using new versions of programs and demonstrate an average speedup of 12-25, depending on the program and input size.
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