130 citations · 710 across the 21 of their papers we have counts for
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cond-mat.str-el2006★ 6 cited
U(1) symmetry breaking in one-dimensional Mott insulator studied by the Density Matrix Renormalization Group method
Isao Maruyama, Tetsuji Koide, Yasuhiro Hatsugai
A new type of external fields violating the particle number preservation is studied in one-dimensional strongly correlated systems by the Density Matrix Renormalization Group metho…
cond-mat.mes-hall2006★ 117 cited
Topological aspects of quantum spin Hall effect in graphene: Z topological order and spin Chern number
T. Fukui, Y. Hatsugai
For generic time-reversal invariant systems with spin-orbit couplings, we clarify a close relationship between the Z topological order and the spin Chern number proposed by Kan…
cond-mat.mes-hall2006
Entanglement entropy and the Berry phase in solid states
S. Ryu, Y. Hatsugai
The entanglement entropy (von Neumann entropy) has been used to characterize the complexity of many-body ground states in strongly correlated systems. In this paper, we try to esta…