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arXiv quant-ph/9905027quant-ph
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无级联容错量子计算

Toward fault-tolerant quantum computation without concatenation

Eric Dennis

摘要:

已经知道,如果物理量子比特的错误率低于某个准确度阈值,则可以以指数级小的失败率完成经由级联码的量子纠错。其他的非级联码也因其自身的优点--改进的精度门限、局部操作等而被广泛研究。通过迭代地提取一定的两个量子比特纠缠态,它示出了如何执行一个编码的Toffoli门,重要的通用计算,对CSS代码,无论是不级联或,对于一系列非常大的块大小,单级联。

英文摘要:

It has been known that quantum error correction via concatenated codes can be done with exponentially small failure rate if the error rate for physical qubits is below a certain accuracy threshold. Other, unconcatenated codes with their own attractive features-improved accuracy threshold, local operations-have also been studied. By iteratively distilling a certain two-qubit entangled state it is shown how to perform an encoded Toffoli gate, important for universal computation, on CSS codes that are either unconcatenated or, for a range of very large block sizes, singly concatenated.

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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