158 citations · 503 across the 8 of their papers we have counts for
8 papers
Quantum phase transitions in the Kane-Mele-Hubbard model
M. Hohenadler, Z. Y. Meng, T. C. Lang +3
We study the two-dimensional Kane-Mele-Hubbard model at half filling by means of quantum Monte Carlo simulations. We present a refined phase boundary for the quantum spin liquid. T…
One-particle spectral properties of the t-J- model on the triangular lattice near charge order
M. Bejas, A. Greco, A. Muramatsu +1
We study the t-J- model beyond mean field level at finite doping on the triangular lattice. The Coulomb repulsion between nearest neighbors brings the system to a charge ord…
Coherent matter waves emerging from Mott-insulators
K. Rodriguez, S. R. Manmana, M. Rigol +2
We study the formation of (quasi-)coherent matter waves emerging from a Mott insulator for strongly interacting bosons on a one-dimensional lattice. It has been shown previously th…
Free expansion of impenetrable bosons on one-dimensional optical lattices
Marcos Rigol, Alejandro Muramatsu
We review recent exact results for the free expansion of impenetrable bosons on one-dimensional lattices, after switching off a confining potential. When the system is initially in…
Doping dependence of the spin gap in a 2-leg ladder
L. Campos Venuti, A. Muramatsu
A spin-fermion model relevant for the description of cuprates ladders is studied in a path integral formalism, where, after integrating out the fermions, an effective action for th…
Phase diagram of the three-dimensional Hubbard model at half filling
R. Staudt, M. Dzierzawa, A. Muramatsu
We investigate the phase diagram of the three-dimensional Hubbard model at half filling using quantum Monte Carlo (QMC) simulations. The antiferromagnetic Neel temperature T_N is d…
Single hole dynamics in the t-J model on a square lattice
Michael Brunner, Fakher F. Assaad, Alejandro Muramatsu
We present quantum Monte Carlo (QMC) simulations for a single hole in a t-J model from J=0.4t to J=4t on square lattices with up to 24 x 24 sites. The lower edge of the spectrum is…
Gauge Theory for a Doped Antiferromagnet in a Rotating Reference-Frame
C. Kübert, A. Muramatsu
We study a doped antiferromagnet (AF) using a rotating reference-frame. Whereas in the laboratory reference-frame with a globally fixed spin-quantization axis (SQA) the long-wavele…