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Elementary excitations of the symmetric spin-orbital model: The XY limit
F. Mila, B. Frischmuth, A. Deppeler +1
The elementary excitations of the 1D, symmetric, spin-orbital model are investigated by studying two anisotropic versions of the model, the pure XY and the dimerized XXZ case, with…
Thermodynamics of Random Ferromagnetic Antiferromagnetic Spin-1/2 Chains
Beat Frischmuth, Manfred Sigrist, Beat Ammon +1
Using the quantum Monte Carlo Loop algorithm, we calculate the temperature dependence of the uniform susceptibility, the specific heat, the correlation length, the generalized stag…
Thermodynamics of the one-dimensional SU(4) symmetric spin-orbital model
Beat Frischmuth, Frederic Mila, Matthias Troyer
The ground state properties and the thermodynamics of the one-dimensional SU(4) symmetric spin system with orbital degeneracy are investigated using the quantum Monte Carlo loop al…
Quantum spin chains in a magnetic field
V. A. Kashurnikov, N. V. Prokof'ev, B. V. Svistunov +1
We demonstrate that the ``worm'' algorithm allows very effective and precise quantum Monte Carlo (QMC) simulations of spin systems in a magnetic field, and its auto-correlation tim…