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arXiv quant-ph/0312112quant-ph
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量子点阵列上的隐形传态

Teleportation on a quantum dot array

F. de Pasquale, G. Giorgi, S. Paganelli

摘要:

提出了一种基于双量子点阵列的量子隐形传态协议模型。利用一对量子点与一个多余电子通过隧穿耦合对未知量子比特进行编码,并利用不同量子点对之间的库仑排斥作用,给出了如何利用这类量子比特产生最大纠缠态的方法.利用这些纠缠态与进入的未知态之间的绝热耦合再次进行隐形传态。最后,鲍勃的量子位的突然分离使得爱丽丝的状态的时间演化提供了标准贝尔测量的修改版本。用一串耦合的DQD替代四个量子点的纠缠态,得到了一个高保真度的量子信道,实现了长距离传输。

英文摘要:

We present a model of quantum teleportation protocol based on a double quantum dot array. The unknown qubit is encoded using a pair of quantum dots, coupled by tunneling, with one excess electron. It is shown how to create maximally entangled states with this kind of qubits using an adiabatically increasing Coulomb repulsion between different pairs. This entangled states are exploited to perform teleportation again using an adiabatic coupling between them and the incoming unknown state. Finally, a sudden separation of Bob's qubit enables a time evolution of Alice's state providing a modified version of standard Bell measurement. Substituting the four quantum dots entangled state with a chain of coupled DQD's, a quantum channel with high fidelity arises from this scheme allowing the transmission over long distances.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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