Tailoring Spin Chain Dynamics for Fractional Revivals
Tailoring Spin Chain Dynamics for Fractional Revivals
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DOI：
10.22331/q-2017-08-10-24
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发表时间：
2016-09
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通讯作者：
A. Kay
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文献类型：
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作者：
A. Kay
通过开发工具来重新设计一个完美的状态转移自旋链，以便在多个位点上输出可分离的输入激发，研究了用于量子协议和技术所需的量子态的产生。我们特别关注自旋链上的一小部分量子比特叠加激发的情况，称为分数恢复，证明自旋链能够在高速下产生比以前已知的更大范围的分数恢复。我们还提供了一种产生任意单激发态（如W态）的链的数值技术。
The production of quantum states required for use in quantum protocols & technologies is studied by developing the tools to re-engineer a perfect state transfer spin chain so that a separable input excitation is output over multiple sites. We concentrate in particular on cases where the excitation is superposed over a small subset of the qubits on the spin chain, known as fractional revivals, demonstrating that spin chains are capable of producing a far greater range of fractional revivals than previously known, at high speed. We also provide a numerical technique for generating chains that produce arbitrary single-excitation states, such as the W state.