192 citations · 285 across the 8 of their papers we have counts for
8 papers
Renormalization of the Spin-Peierls Transition due to Phonon Dynamics
S. Trebst, N. Elstner, H. Monien
We report results from a systematic strong-coupling expansion of a spin-1/2 Heisenberg chain coupled to Einstein phonons. In the non-adiabatic regime this model is used to describe…
A numerical exact solution of the Bose-Hubbard model
Norbert Elstner, Hartmut Monien
In this paper we report results from a systematic strong-coupling expansion of the Bose-Hubbard model in one and two spatial dimensions. We obtain numerically exact results for the…
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…
Field dependent thermodynamics and Quantum Critical Phenomena in the dimerized spin system Cu2(C5H12N2)2Cl4
Norbert Elstner, Rajiv R. P. Singh
Experimental data for the uniform susceptibility, magnetization and specific heat for the material Cu2(C5H12N2)2Cl4 (abbreviated CuHpCl) as a function of temperature and external f…
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…
Possible explanation for the absence of bilayer splitting in YBCO
H. Monien, N. Elstner, A. J. Millis
It has been claimed that the absence of the bilayer splitting in the high-temperature superconductor YBCO is a strong experimental indication that there are no coherent quasipartic…
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…