Multiconfigurational symmetrized-projector quantum Monte Carlo method for low-lying excited states of the Hubbard model.

نویسندگان

  • Srinivasan
  • Ramasesha
  • Krishnamurthy
چکیده

We develop a novel multi-configurational Symmetrized Projector Quantum Monte Carlo (MSPQMC) method to calculate excited state properties of Hubbard models. We compare the MSPQMC results for finite Hubbard chains with exact results (where available) or with Density Matrix Renormalization Group (DMRG) results for longer chains. The energies and correlation functions of the excited states are in good agreement with those obtained from the alternate techniques.

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عنوان ژورنال:
  • Physical review. B, Condensed matter

دوره 54 4  شماره 

صفحات  -

تاریخ انتشار 1996