Software Downloads

PARSEC is made available to the community free of charge, under the GNU General Public License. Please be aware that this code comes as is. We make no warranty with respect to any bugs and we cannot respond to help requests. See our user’s guide for help. Legal issues are covered by the General Public License .

A trial version of the code (PARSEC 1.3) can be downloaded here . This is an older version of PARSEC. Want the latest stable version? Write to us, the code is available on request.

The user’s guide is available here.

If you publish work using our code, please cite some of the following articles:

J. R. Chelikowsky, N. Troullier, and Y. Saad, Finite-difference pseudo potential method: Electronic structure calculations without a basis, Phys. Rev. Lett. 72, 1240 (1994).

J. R. Chelikowsky, The pseudopotential-density functional method applied to nanostructures, J. of Phys. D 33, R33 (2000).

L. Kronik, A. Makmal, M.L. Tiago, M.M.G. Alemany, M. Jain, X. Huang, Y. Saad, and J.R. Chelikowsky, PARSEC-the pseudopotential algorithm for real-space electronic structure calculations: Recent Advances and novel applications to nano-structures, physica status solidi (b) 243, 1063 (2006).

Y. Saad, J.R. Chelikowsky and S.M. Shontz, Numerical methods for electronic structure calculations of materials, SIAM Rev. 52, 3 (2010).



Use of the L-BFGS package, part of PARSEC, is also subject to conditions of use.

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