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arXiv 1209.0637quant-ph
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量子比特损失对Grover量子搜索算法的影响

Effect of qubit losses on Grover's quantum search algorithm

D. D. Bhaktavatsala Rao, Klaus Mølmer

摘要:

我们研究了Grover的量子搜索算法在寄存器上的性能,该寄存器会丢失携带量子比特信息的粒子。假设该算法的基本步骤被正确地应用在相应的收缩寄存器,我们表明,该算法收敛到混合状态与目标状态的位位置仍然存在50%的重叠。作为一种替代纠错,我们提出了一个程序,结合不同的试验结果的算法,以确定解决方案的完整的搜索问题。该过程可能是相关的实验中,该算法是适应的粒子的损失登记,并与里德堡封锁中性原子之间的相互作用的实验,其中监测的原子损失甚至是不必要的。

英文摘要:

We investigate the performance of Grover's quantum search algorithm on a register which is subject to loss of the particles that carry the qubit information. Under the assumption that the basic steps of the algorithm are applied correctly on the correspondingly shrinking register, we show that the algorithm converges to mixed states with 50% overlap with the target state in the bit positions still present. As an alternative to error correction, we present a procedure that combines the outcome of different trials of the algorithm to determine the solution to the full search problem. The procedure may be relevant for experiments where the algorithm is adapted as the loss of particles is registered, and for experiments with Rydberg blockade interactions among neutral atoms, where monitoring of the atom losses is not even necessary.

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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