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numexercises7_14 [2014/07/14 08:00]
bogner created
numexercises7_14 [2014/07/14 08:43]
bogner
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 ===== Numerical Exercises for Monday July 14 ===== ===== Numerical Exercises for Monday July 14 =====
  
-  ​In your favorite programming language, make a program to construct a $NxN$ matrix+  ​* Install Git, and try out some of the commands covered in Morten or Nicolas'​s lecture slides ({{:​computing.pdf|}} {{:​talentdftguides.pdf|}}) for your codes in the following problems. 
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 +  * In your favorite programming language, make a program to construct a real symmetric ​$NxN$ matrix. Diagonalize it using the appropriate LAPACK or GSL routine, and write out some number of the lowest eigenvalues. (Suggestion:​ You might find it useful to use Mathematica (available on the ECT* computers) to diagonalize a small matrix that you can benchmark against.) This will help you test that you've linked to the GSL or LAPACK library. 
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 +  * The code {{:​coulomboscrelme.f90.zip|}} calculates the relative matrix elements $\langle nl|V|n'​l\rangle$ in HO states. From this, construct a subroutine that returns the properly normalized $r$-space HO wf's. For some basic background on HO wf's, see  {{:​ho_spherical.pdf| here}}. 
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 +  * Check numerically that the constructed HO wf's are orthonormal. To do this, you will want to use Gaussian quadrature to discretize the integrals. Gaussian quadrature is discussed a bit in {{:​ho_spherical.pdf| }}. If you don't have a routine to calculate quadrature points/​weights,​ take advantage of Google to find a canned routine to do this for you. 
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 +  * Construct a subroutine that returns relative HO matrix elements of the Minnesota NN potential. The definition of the Minnesota potential is here: 
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numexercises7_14.txt · Last modified: 2014/07/14 13:40 by bogner