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cond-mat.str-el2011★ 1 cited
Quantum disordered ground state for the frustrated square lattice
A. Kalz, A. Honecker, S. Fuchs +1
We present Quantum Monte-Carlo simulations of an exchange-anisotropic spin-1/2 Heisenberg model on a square lattice with nearest and next-nearest neighbor interactions. The ground…
cond-mat.str-el2011★ 30 cited
Dual Fermion Dynamical Cluster Approach for Strongly Correlated Systems
S. -X. Yang, H. Fotso, H. Hafermann +4
We have designed a new multi-scale approach for Strongly Correlated Systems by combining the Dynamical Cluster Approximation (DCA) and the recently introduced dual-fermion formalis…
cond-mat.str-el2011★ 12 cited
Quantum disordered ground state for hard-core bosons on the frustrated square lattice
A. Kalz, A. Honecker, S. Fuchs +1
We investigate the phase diagram of hard-core bosons on a square lattice with competing interactions. The hard-core bosons can be represented also by spin-1/2 operators and the mod…