2 papers
quant-ph2004
The ground state entanglement in the model
Shi-Jian Gu, Guang-Shan Tian, Hai-Qing Lin
In this paper, we investigate spin entanglement in the model defined on a -dimensional bipartite lattice. The concurrence, a measure of the entanglement between two spins,…
cond-mat.str-el2004
On the ground state and excitations of a four-component fermion model
You-Quan Li, Guan-Shan Tian, Michael Ma +1
The properties of the ground state and excitations of a four-component Hubbard-like model are studied by the Lieb-Schultz-Mattis approach. It is proven rigorously that the ground s…