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arXiv 1408.7017quant-ph
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利用边界态多重态通过自旋链转移纠缠态

Transferring entangled states through spin chains by boundary-state multiplets

Peter Lorenz, Joachim Stolze

摘要:

量子自旋链可以用于在量子信息处理设备的元件之间转移量子态。最近发现的一种方案\cite{BFR+12}被证明即使在存在由制造误差引起的内建静态无序的情况下也具有良好的单量子比特态传输特性。我们在\cite{BFR+12}中已经提出的方法中扩展了该方案,并研究了在两量子比特希尔伯特空间中形成最大纠缠基的四个Bell态的转移。我们表明,完美的转移的所有四个贝尔状态单独和任意的线性组合可以实现链与数百个自旋。为了简单起见,我们把自己限制在没有无序的系统中。

英文摘要:

Quantum spin chains may be used to transfer quantum states between elements of a quantum information processing device. A scheme discovered recently \cite{BFR+12} was shown to have favorable transfer properties for ingle-qubit states even in the presence of built-in static disorder caused by manufacturing errors. We extend that scheme in a way suggested already in \cite{BFR+12} and study the transfer of the four Bell states which form a maximally entangled basis in the two-qubit Hilbert space. We show that perfect transfer of all four Bell states separately and of arbitrary linear combinations may be achieved for chains with hundreds of spins. For simplicity we restrict ourselves to systems without disorder.

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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