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cond-mat.quant-gas2016★ 15 cited
Twisted superfluid phase in the extended one-dimensional Bose-Hubbard model
Dirk-Sören Lühmann
In one-dimensional systems a twisted superfluid phase is found which is induced by a spontaneous breaking of the time-reversal symmetry. Using the density-matrix renormalization gr…
cond-mat.quant-gas2013★ 74 cited
Cluster Gutzwiller method for bosonic lattice systems
Dirk-Sören Lühmann
A versatile and numerically inexpensive method is presented allowing the accurate calculation of phase diagrams for bosonic lattice models. By treating clusters within the Gutzwill…