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35 papers · 1 filter
Thermodynamics and Crossover Phenomena in the Correlation Lengths of the One-Dimensional t-J Model
J. Sirker, A. Klümper
We investigate the thermodynamics of the one-dimensional t-J model using transfer matrix renormalization group (TMRG) algorithms and present results for quantities like particle nu…
Temperature driven crossover phenomena in the correlation lengths of the one-dimensional t-J model
J. Sirker, A. Klümper
We describe a modified transfer matrix renormalization group (TMRG) algorithm and apply it to calculate thermodynamic properties of the one-dimensional t-J model. At the supersymme…
Entropy Driven Dimerization in a One-Dimensional Spin-Orbital Model
J. Sirker, G. Khaliullin
We study a new version of the one-dimensional spin-orbital model with spins S=1 relevant to cubic vanadates. At small Hund's coupling J_H we discover dimerization in a pure electro…
Nonequilibrium evolution of Phi**4 theory in 1+1 dimensions in the 2PPI formalism
Jurgen Baacke, Andreas Heinen
We consider the out-of-equilibrium evolution of a classical condensate field and its quantum fluctuations for a Phi**4 model in 1+1 dimensions with a symmetric and a double well po…
J-ψProduction via χ_c Decays in 920 GeV pA Interactions
B Collaboration
Using data collected by the HERA-B experiment, we have measured the fraction of Jψ's produced via radiative chi_c decays in interactions of 920 GeV protons with carbon and titanium…
Efficient implementations of the Quantum Fourier Transform: an experimental perspective
Kavita Dorai, Dieter Suter
The Quantum Fourier transform (QFT) is a key ingredient in most quantum algorithms. We have compared various spin-based quantum computing schemes to implement the QFT from the poin…