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arXiv quant-ph/0505088quant-phcs.CC
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关于通信中的共享随机性和共享纠缠的注记

A Note on Shared Randomness and Shared Entanglement in Communication

Dmytro Gavinsky

摘要:

我们考虑了几种单轮经典和量子通信模型,其中一些模型以前没有定义过。我们“几乎分离”了具有共享纠缠的量子信息同时传递模型和具有共享随机性的量子信息同时传递模型。我们定义了一个关系,它可以有效地精确地解决在第一个模型,但不能有效地解决,无论是精确或在0错误设置在第二个模型。事实上,我们的关系是完全可解的,即使在一个更严格的模型,同时经典的消息传递共享纠缠。作为我们的第二个贡献,我们加强了姚的结果,一个“非常短”的协议,从模型的同时经典消息传递共享随机性可以模拟在模型的同时量子消息传递:对于一个布尔函数f,QII(f)\in exp(O(RIIp(f)log n。我们从一个(更强的)模型的1-路经典的消息传递共享随机性:QII(f)\in exp(O(RIp(f)log n协议显示了类似的结果。我们证明了一个问题,其有效的解决方案的模型中的同时量子消息传递遵循我们的结果,但不是从姚的。

英文摘要:

We consider several models of 1-round classical and quantum communication, some of these models have not been defined before. We "almost separate" the models of simultaneous quantum message passing with shared entanglement and the model of simultaneous quantum message passing with shared randomness. We define a relation which can be efficiently exactly solved in the first model but cannot be solved efficiently, either exactly or in 0-error setup in the second model. In fact, our relation is exactly solvable even in a more restricted model of simultaneous classical message passing with shared entanglement. As our second contribution we strengthen a result by Yao that a "very short" protocol from the model of simultaneous classical message passing with shared randomness can be simulated in the model of simultaneous quantum message passing: for a boolean function f, QII(f) \in exp(O(RIIp(f))) log n. We show a similar result for protocols from a (stronger) model of 1-way classical message passing with shared randomness: QII(f) \in exp(O(RIp(f))) log n. We demonstrate a problem whose efficient solution in the model of simultaneous quantum message passing follows from our result but not from Yao's.

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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