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Unified treatment for accurate and fast evaluation of the Fermi-Dirac functions |
I. I. Guseinov and B. A. Mamedov |
Department of Physics, Faculty of Arts and Sciences, Onsekiz Mart University, ?anakkale, Turkey; Department of Physics, Faculty of Arts and Sciences, Gaziosmanpa?a University, Tokat, Turkey |
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Abstract A new analytical approach to the computation of the Fermi-Dirac (FD) functions is presented, which was suggested by previous experience with various algorithms. Using the binomial expansion theorem, these functions are expressed through the binomial coefficients and familiar incomplete Gamma functions. This simplification and the use of the memory of the computer for calculation of binomial coefficients may extend the limits to large arguments for users and result in speedier calculation, should such limits be required in practice. Some numerical results are presented for significant mapping examples and they are briefly discussed.
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Received: 02 October 2009
Accepted manuscript online:
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PACS:
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05.30.Fk
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(Fermion systems and electron gas)
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02.30.Lt
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(Sequences, series, and summability)
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02.30.Mv
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(Approximations and expansions)
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02.30.Sa
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(Functional analysis)
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Cite this article:
I. I. Guseinov and B. A. Mamedov Unified treatment for accurate and fast evaluation of the Fermi-Dirac functions 2010 Chin. Phys. B 19 050501
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