title: Gapped two-body hamiltonian whose unique ground state is universal for one-way quantum computation.
abstract: Many-body entangled quantum states studied in condensed matter physics can be primary resources for quantum information, allowing any quantum computation to be realized using measurements alone, on the state. Such a universal state would be remarkably valuable, if only it were thermodynamically stable and experimentally accessible, by virtue of being the unique ground state of a physically reasonable Hamiltonian made of two-body, nearest-neighbor interactions. We introduce such a state, composed of six-state particles on a hexagonal lattice, and describe a general method for analyzing its properties based on its projected entangled pair state representation.
authors: Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: Xie
authors: X
authors: Chen
authors: Bei
authors: B
authors: Zeng
authors: Zheng-Cheng
authors: ZC
authors: Gu
authors: Beni
authors: B
authors: Yoshida
authors: Isaac L
authors: IL
authors: Chuang