Preparation Of Arbitrary Two-qubit State Research Articles

Deterministic joint remote state preparation of arbitrary two-qubit state through noisy cluster-GHZ channel

We have investigated the effect of different quantum noises on deterministic joint remote state preparation of arbitrary two-qubit systems, carried out through the collective action on a coupled cluster-GHZ state without introducing auxiliary qubit. The present scheme is deterministic, in comparison to the existing probabilistic schemes. The selection of measurement bases plays a crucial role in the success of our scheme. We have demonstrated the effect of six distinct noises on information loss, quantified through the fidelity measure. The loss of information is found to be minimum for amplitude damping channel and is maximum for the bit-flip channel.

基于三粒子非最大纠缠态的两粒子概率远程态制备

本文提出了一种基于两个三粒子部分纠缠GHZ态的任意两粒子远程态制备方案。此制备协议并不需要引入辅助粒子，总体成功概率等于纠缠通道两个最小幅值模平方之积。结合具体幺正矩阵与测量基形式，本文给出了制备协议实现步骤。当纠缠通道取为两个最大纠缠GHZ态时，总体成功概率则等于1/4。 In this paper, we presented a novel scheme for probabilistic remote preparation of arbitrary two-qubit state via two three-qubit GHZ states. Any auxiliary particles need not to be introduced in our proposal. The total successful probability is equal to the square of the norm of the minimum amplitude coefficients of the partially entangled channel. The concrete processe of this scheme is presented via some appropriate local unitary operations and measurement basis. When quantum channel is composed of two three-qubit maximally entangled states, the successful probability is equal to 1/4.

Joint remote state preparation of arbitrary two-qubit state with six-qubit state

We present a novelty scheme for joint remote preparation of an arbitrary two-qubit state in a probabilistic manner from a spatially separated multi-sender to one receiver. The probability of success regarding this preparation scheme is calculated in both general and some particular cases. Our results show that in general such remote state preparation can be realized with a probability of 1/4. But in several special cases, the probability of success can be improved to 1/2 or even 1.