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International Journal of Quantum Information

PROBABILISTIC AND CONTROLLED TELEPORTATION OF UNKNOWN IONIC STATES VIA LINEAR OPTICAL ELEMENTS

Zhuo‐Liang Cao, Jian Zhou, Ming Yang

Published May 30, 2007• 2 citations
Publisher

Abstract

We propose a simple scheme for teleporting an unknown state in a probabilistic and controlled manner via linear optical elements using a tripartite entangled GHZ state. By using a Mach–Zehnder interferometer, we realize all teleportation processes by only single-qubit measurements; thus our scheme is readily realizable within current technology.

DOI
10.1142/s0219749907002931

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Journal of Huaiyin Teachers College•Jan 1, 2008•0 citations
We propose a simple scheme for teleporting an unknown state in a probabilistic and controlled manner via linear optical elements using a tripartite entangled GHZ state. By using a Mach–Zehnder interferometer, we realize all teleportation processes by only single-qubit measurements; thus our scheme is readily realizable within current technology.
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Teleportation schemes with a tripartite entangled state in cavity QED are investigated. The schemes do not need Bell state measurements and the successful probabilities reach optimality. In addition, the schemes are insensitive to both the cavity decay and the thermal field. We first consider two teleportation schemes via a tripartite GHZ state. The first one is a controlled one for an unknown single-qubit state. The second scheme is teleportation of unknown two-atom entangled state. Then we consider teleporting of single-qubit arbitrary state via a tripartite W state.
We propose a linear optical scheme for the teleportation of unknown ionic states, the entanglement concentration for nonmaximally entangled states for ions via entanglement swapping and the remote preparation for ionic entangled states. The unique advantage of the scheme is that the joint Bell-state measurement needed in the previous schemes is not needed in the current scheme, i.e. the joint Bell-state measurement has been converted into the product of separate measurements on single ions and photons. In addition, the current scheme can realize the quantum information processes for ions by using linear optical elements, which simplify the implementation of quantum information processing for ions.
In this paper,a protocol which can realize probabilistic quantum teleportation of an unknown classical tripartite W entangled state is proposed.Controlled probabilistic quantum teleportation of an unknown generic tripartite W entangled state with a non-maximal tripartite GHZ entangled state and a pair of non-maximal EPR entangled particles as the quantum channels can be realized too.The teleportation associates with the generalized Bell-basis measurement and the C-Not operate,respectively.After the base vector transformation,an auxiliary qubit which the initial state is in the zero state and the corresponding unitary transformation are included in this protocol.