Solving search problems by strongly simulating quantum circuits.

Solving search problems by strongly simulating quantum circuits.
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DOI:
10.1038/srep01235
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Jaksch, D.
Jaksch, D.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Johnson, T. H.;Biamonte, J. D.;Clark, S. R.;Jaksch, D.

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Simulating quantum circuits using classical computers lets us analyse the inner workings of quantum algorithms. The most complete type of simulation, strong simulation, is believed to be generally inefficient. Nevertheless, several efficient strong simulation techniques are known for restricted families of quantum circuits and we develop an additional technique in this article. Further, we show that strong simulation algorithms perform another fundamental task: solving search problems. Efficient strong simulation techniques allow solutions to a class of search problems to be counted and found efficiently. This enhances the utility of strong simulation methods, known or yet to be discovered, and extends the class of search problems known to be efficiently simulable. Relating strong simulation to search problems also bounds the computational power of efficiently strongly simulable circuits; if they could solve all problems in P this would imply that all problems in NP and #P could be solved in polynomial time.
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