Single hole dynamics in the one-dimensional - model |
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Authors: | M Brunner FF Assaad A Muramatsu |
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Institution: | Institut für Theoretische Physik III, Universit?t Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany, DE
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Abstract: | We present a new finite-temperature quantum Monte Carlo algorithm to compute imaginary-time Green functions for a single hole
in the t-J model on non-frustrated lattices. Spectral functions are obtained with the Maximum Entropy method. Simulations of the one-dimensional
case show that a simple charge-spin separation Ansatz is able to describe the overall features of the spectral function such as the bandwidth and the compact support of the spectral function, over the whole energy range for values of J
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t from 1/3 to 4. This is contrasted with the two-dimensional case. The quasiparticle weight Zk is computed on lattices up to L
=128 sites in one dimension, and scales as .
Received 15 February 2000 |
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Keywords: | PACS 71 10 Fd Lattice fermion models (Hubbard model etc ) - 71 10 Pm Fermions in reduced dimensions (anyons composite fermions Luttinger liquid etc ) |
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