Abundance of translation invariant pure states on quantum spin chains

authored by: M. Fannes, B. Nachtergaele, R. F. Werner
Abstract: We construct a set of translation invariant pure states of a quantum spin chain, which is w*-dense in the set of all translation invariant states of the chain. Each of the approximating states has exponential decay of correlations, and is the unique ground state of a finite range Hamiltonian with a spectral gap above the ground state energy.
Organisation(s): Institute of Theoretical Physics
Type: Article
Journal: Lett. Math. Phys.
Volume: 25
Pages: 249-258
No. of pages: 10
Publication date: 1992
Publication status: Published
Peer reviewed: Yes
Electronic version(s): https://doi.org/10.1007/BF00406552 (Access: Unknown)