Abstract In a recent paper, DONG et al. proposed a scheme for probabilistic controlled teleportation of a triplet W state using combined non-maximally entangled channel of two Einstein-Podolsky-Rosen (EPR) states and one Greenberger-Horne-Zeilinger (GHZ) state. In this paper, only using one Einstein-PodolskyRosen (EPR) state and one Greenberger-Horne-Zeilinger (GHZ) state, the scheme for probab...

X iv :q ua nt -p h/ 02 04 05 7v 1 1 1 A pr 2 00 2 High-fidelity teleportation of entanglements of running-wave field states R. M. Serra, C. J. Villas-Boas, N. G. de Almeida, and M. H. Y. Moussa. 1Departamento de F́ısica, Universidade Federal de São Carlos, P.O. Box 676, São Carlos, 13565-905, São Paulo, Brazil. 2Departamento de Matemática e F́ısica, Universidade Católica de Goiás, P.O. Box 86, Go...

Braunstein and Kimble observe correctly that, in the Innsbruck experiment, one does not always observe a teleported photon conditioned on a coincidence recording at the Bell-state analyser. In their opinion, this affects the fidelity of the experiment, but we believe, in contrast, that it has no significance, and that when a teleported photon appears, it has all the properties required by the t...

The development of techniques for manipulation of quantum information has opened the door to a variety of protocols for accomplishing unprecedented tasks. In particular, a new protocol of quantum teleportation was proposed in 2008 to achieve e¤ective energy transportation simply via local operations and classical communication — without breaking any known physical laws. This is achieved by extr...

We address fundamental limitations of quantum teleportation -- the process transferring information using classical communication and preshared entanglement. develop a new protocol based upon idea ancillary entanglement catalytically, i.e. without depleting it. This is then used to show that catalytic allows for noiseless channel be simulated with quality could never achieved only from shared s...