192 citations · 285 across the 8 of their papers we have counts for
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Quantum phase transitions in the Triangular-lattice Bilayer Heisenberg Model
Rajiv R. P. singh, Norbert Elstner
We study the triangular lattice bilayer Heisenberg model with antiferromagnetic interplane coupling and nearest neighbour intraplane coupling , which can be…
Dynamics and Thermodynamics of the Bose-Hubbard model
N. Elstner, H. Monien
We report results from a systematic analytic strong-coupling expansion of the Bose-Hubbard model in one and two spatial dimensions. We obtain numerically exact results for the disp…
Is a Trapped One-Dimensional Bose Gas a Luttinger Liquid?
H. Monien, M. Linn, N. Elstner
The low-energy fluctuations of a trapped, interacting quasi one-dimensional Bose gas are studied. Our considerations apply to experiments with highly anisotropic traps. We show tha…
Crossover Phase Diagram of 2D Heisenberg Ferro- and Antiferromagnets
Alexander Sokol, Norbert Elstner, Rajiv R. P. Singh
We propose a single crossover phase diagram applicable to 2D collinear Heisenberg antiferromagnets (AFMs) and ferromagnets (FMs), and show that the scaling regimes of AFMs and FMs…