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arXiv quant-ph/0702062quant-ph
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利用微波辐射在囚禁离子中实现三方量子密集编码的实用方案

Practical scheme for quantum dense coding between three parties using microwave radiation in trapped ions

Wen-Xing Yang, Zhe-Xuan Gong

摘要:

我们提出了一个在微波和磁场梯度的辅助下,通过操纵三个被限制在微阱中的离子来实现三方之间的二维量子密集编码(QDC)的实用方案.在我们的方案中的离子不需要被严格冷却到振动基态,因为单量子比特和多量子比特操作是通过伊辛项进行的,其中离子的振动模式在整个方案中保持不变,使得我们的方案对离子的加热具有鲁棒性。我们还提出了实施三方QDC实验的详细步骤和参数,并表明所提出的方案是在目前的离子阱实验技术。

英文摘要:

We propose a practical scheme for implementing two-dimension quantum dense coding (QDC) between three parties through manipulating three ions confined in microtraps addressed by microwaves and assisted by a magnetic field gradient. The ions in our scheme are not required to be strictly cooled to the vibrational ground state because single-qubit and multi-qubit operations are made via Ising terms, in which the vibrational modes of the ions remain unchanged throughout the scheme, rendering our scheme robust to the heating of the ions. We also present the detailed steps and parameters for implementing the three-party QDC experimentally and show that the proposed scheme is within the current techniques of ion-trap experiments.

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