Regensburg 2000 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 17: Postersitzung II: Pinning und Vortexdynamik (1-8), Supraleitung: Theorie (9-13), Korrelierte Elektronen (14-48), Niederdimensionale Systeme (49-68), Quantenflüssigkeiten (69-75)

TT 17.39: Poster

Mittwoch, 29. März 2000, 14:30–18:00, A

Dynamical properties of the 1D t-J model at finite doping — •Catia Lavalle, Michael Brunner, Fakher Assaad, and Alejandro Muramatsu — Institut für Theoretische Physik III, Universität Stuttgart

We developed a new Monte Carlo technique (Hybrid-loop MC) that is able to treat the t-J model at finite doping taking advantage from the properties of the Projector MC (no limitation in the measurable observable) and of the Loop MC (absence of critical slowing down). This new technique allows us to calculate dynamical properties of the t-J model in 1D at finite doping in the whole range of parameters (J/t). The results can be compared with experiments using an analytic continuation of data in imaginary time with the maximum entropy method. Here we present spectral properties in different regions of the phase diagram (density vs J) of the model [1].

[1] M. Ogata, M. U. Luchini, S. Sorella and F. F. Assaad, Phys. Rev. Lett. 66, 2388 (1991)