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SCS_Lanczos

  1. This code is developed regularly. If you are interested in using this code, please contact the author.

  2. This code is written by Nitin Kaushal (kaushalnitin002@gmail.com) This solves various Strongly correlated systems using the Lanczos Algorithm. This code also performs ED (without Lanczos) for "small enough" systems.

  3. Author's affiliations so far: University of Tennessee, Knoxville, USA Oak Ridge National Lab, USA University of British Columbia, Canada (Present)

*SCS stands for Strongly correlated systems.

NOTES for input script:

  1. if "Get_overlap_with_basis = true" is given in input, it makes "Get_Full_Spectrum = true" and "need_few_eig_vecs = true" as well.
  2. if "need_few_eig_vecs = true" is given in input, in makes ""Get_Full_Spectrum = true" as well.
  3. "States_to_look = 10 0 y r d r.....", it makes "few_ = 10" as well.
  4. remember in "States_to_look = 10 0 y r d r.....", the first state should be always zero.
  5. DUSE_COMPLEX flag should be used to do calculations in complex space.
  6. .. many other things :(