@inbook{d6f5b5fb1d7f4f5c92aeb2b563c1dc8d,

title = "Excitation Spectra in the 1-D Hubbard Model from Quantum-Monte-Carlo Simulations",

abstract = "The numerical simulation of quantum mechanical many-body systems by Monte Carlo Methods is in general only able to deliver ground-state or thermodynamical expectation values of physical observables. Recent developments however, made possible to perform an analytic continuation of imaginary-time quantum Monte Carlo data into real-frequency spectra. In particular the maximum-entropy method (MEM) was successfully applied to the Anderson impurity model and the Heisenberg quantum anti-ferromagnet both in one (1-D) and two (2-D) dimensions. We present here an application of the MEM on quantum Monte Carlo (QMC) simulations of the 1-D Hubbard model for large system sizes (N ≤ 84), such that the characterization of dispersion relations for excitation spectra becomes possible. The one-particle excitations posses cosine-like bands that, surprisingly, agree extremely well with slave-boson mean-field ones. Further comparisons with exact results from Bethe-Ansatz and conformai field-theory demonstrate the reliability of both the QMC simulations as well as the MEM.",

keywords = "Condensed Matter Physics, Mathematical Methods in Physics, Numerical and Computational Physics, Physical Chemistry, Quantum Information Technology, Spintronics, Quantum Physics",

author = "A. Muramatsu and R. Preuss and Linden, {W. von der} and P. Dieterich and Assaad, {F. F.} and W. Hanke",

note = "DOI: 10.1007/978-3-642-79293-910",

year = "1994",

language = "English",

isbn = "978-3-642-79295-3 978-3-642-79293-9",

series = "Springer Proceedings in Physics",

publisher = "Springer Berlin - Heidelberg",

pages = "113--124",

editor = "Landau, {David P.} and Mon, {K. K.} and D, {Professor Heinz-Bernd Sch{\"u}ttler Ph}",

booktitle = "Computer Simulation Studies in Condensed-Matter Physics VII",

}