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VERSION.md

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Version History

January, 2018

  • Submitted to github repository
  • Updated dependencies links to the MATLAB Central repository

November, 2012

  • Full code revision

August, 2012

  • Implemented fast convolution kernel calculation for big time step numbers

July, 2012

  • Implememted splitting in potential scheme for 2D Schrodinger equation
  • Modified the main algorithm to reduce its space complexity

March, 2010

  • Implemented an option to add transparent boundary condition at the left boundary
  • Modified solver function: vectors U_L and U_R do not change their size at each loop step

February, 2010

  • Optimized the implementation of the calculation of convolution in the function calcTimeLevelSolution.m
    • Reduced the calculation time (x400 for m=2400) by switching from conv(X, Y) to conv2(X, Y, 'valid')
    • Reduced the total execution time by replacing all the calls of conj(X)' by transpose(X)
  • Created optimized versions of Matlab's functions dot, dst, and idst (see calcDot, calcDST, and calcIDST respectively): halving execution time for m=2400
  • Implemented a vectorized version of the fucntion getMatrix: execution time reduced in 5 times for m=400 function calls

January, 2010

  • Implemented a function to solve 2D Schrodinger equation

September, 2009

  • Implemented the ability to store the solution for only two time steps

March, 2009

  • Implemented the calculation of the convolution by the inetrnal Matlab's function conv
  • Implemented LU factorisation as an option to solve the system of linear equation
  • Reduced the calculation time in 4 times by implementing a function calcErrors to calculate errors on each time step
  • Created a function plotErrorBehaviour to plot errors

February, 2009

  • Improved visualization functions
    • best location of a legend
    • save graphics in automatic mode
    • update font size in graphics objects

August, 2008

  • Implemented a normalized version of $R^m$
  • Generalization to the case of arbitrary function $\rho(x)$

July, 2008

  • Simplified the calculation of the initial value R(0)
  • Significantly reduced the execution time by introducing import/export procedure
  • Added a function to compute different types of errors
  • Introduced additional input parameters

May, 2008

  • Added codecs support to the multimedia files for screening the founded solution

March, 2008

  • Imroved the code for the case of fully arbitrary value of $\theta$
  • Restructured code for better execution, introduced a function SOLVER

February, 2008

  • Fix the bug in the implementation of the Tridiagonal matrix algorithm for complex matrices, see the function TRISYS
  • Fix the bug in calculation of the argument of a complex number by the standard Matlab's function angle(z) for complex $z\in\mathcol{C}$, see the function getArg
  • Added code comments for main functions

December, 2007

  • Implemented the case of arbitrary value of $\theta$
  • Improved performancy by implementing the recurrent relation for the sequence R(m) and by dropping out the function P_LEGENDRE
  • Introduced the function to measure the execution time of each part of the algorithm

October, 2007

  • Initiated the project with few functions: P_LEGENDRE, R_SEQUENCE, TRISYS, B, V, and psi0.
  • Created first visualization functions for 1D and 2D solutions of Schrodinger equation
  • Implemented the solution of finite-difference scheme (only for $\theta=0$)