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Projector Approximation And Quantum Monte Carlo

Author

Listed:
  • R.M. FYE

    (Sandia National Laboratories Department 1421, P.O. Box 5800 Albuquerque, New Mexico 87185, USA)

Abstract

We derive a general approximation for performing quantum Monte Carlo simulations within a desired subspace of the full Hilbert space. We analytically determine the form of the resulting systematic error, allowing controlled extrapolation to exact results. We discuss some numerical applications, including fermion impurity and lattice models with infinite on-site Colulomb repulsion U and quantum spin systems. We demonstrate the use of the approximation in simulations with a test model.

Suggested Citation

  • R.M. Fye, 1994. "Projector Approximation And Quantum Monte Carlo," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 5(03), pages 483-488.
  • Handle: RePEc:wsi:ijmpcx:v:05:y:1994:i:03:n:s0129183194000660
    DOI: 10.1142/S0129183194000660
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