title: Experimental entanglement distillation of two-qubit mixed states under local operations.
abstract: We experimentally demonstrate optimal entanglement distillation from two forms of two-qubit mixed states under local filtering operations according to the constructive method introduced by [F. Verstraete, Phys. Rev. A 64, 010101(R) (2001)10.1103/PhysRevA.64.010101]. In principle, our setup can be easily applied to distilling entanglement from arbitrary two-qubit partially mixed states. We also test the violation of the Clauser-Horne-Shinmony-Holt inequality for the distilled state from the first form of mixed state to show its "hidden nonlocality."
authors.affiliation: Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei 230026, People's Republic of China. sdzzwzw@ustc.edu.cn
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: Wang
authors.forename: Xiang-Fa
authors.initials: XF
authors.lastname: Zhou
authors.forename: Yun-Feng
authors.initials: YF
authors.lastname: Huang
authors.forename: Yong-Sheng
authors.initials: YS
authors.lastname: Zhang
authors.forename: Xi-Feng
authors.initials: XF
authors.lastname: Ren
authors.forename: Guang-Can
authors.initials: GC
authors.lastname: Guo