title: Demonstration of quantum telecloning of optical coherent states.
abstract: We demonstrate unconditional telecloning for the first time. In particular, we symmetrically and unconditionally teleclone coherent states of light from one sender to two receivers, achieving a fidelity for each clone of F = 0.58 +/- 0.01, which surpasses the classical limit. This is a manipulation of a new type of multipartite entanglement whose nature is neither purely bipartite nor purely tripartite.
authors.affiliation: Department of Applied Physics, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Koike
authors.forename: Hiroki
authors.initials: H
authors.lastname: Takahashi
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Yonezawa
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Takei
authors.forename: Samuel L
authors.initials: SL
authors.lastname: Braunstein
authors.forename: Takao
authors.initials: T
authors.lastname: Aoki
authors.forename: Akira
authors.initials: A
authors.lastname: Furusawa