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arXiv quant-ph/0203004quant-ph
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在多体量子态中隐藏经典数据

Hiding classical data in multi-partite quantum states

T. Eggeling, R. F. Werner

摘要:

我们提出了一种在多体量子态中隐藏经典比特的一般方法。在两种可能的密度算符中选择一种进行编码的隐藏比特,在没有量子通信的情况下,不能通过局部操作和经典通信来恢复。该方案仍然是安全的,如果量子通信被允许在某些合作伙伴之间,并且可以被设计为任何选择的量子通信模式是安全的,但允许几乎完美的恢复所有其他模式。如果在每个站点处的系统足够高维,则隐藏位的不期望恢复的最大概率以及允许的恢复操作的最大误差可以被选择为任意小。不需要纠缠,因为隐藏态可以选择为可分离的。先前纠缠的单个ebit不足以破坏该方案。

英文摘要:

We present a general technique for hiding a classical bit in multipartite quantum states. The hidden bit, encoded in the choice of one of two possible density operators, cannot be recovered by local operations and classical communication without quantum communication. The scheme remains secure if quantum communication is allowed between certain partners, and can be designed for any choice of quantum communication patterns to be secure, but to allow near perfect recovery for all other patterns. The maximal probability of unwanted recovery of the hidden bit, as well as the maximal error for allowed recovery operations can be chosen to be arbitrarily small, given sufficiently high dimensional systems at each site. No entanglement is needed since the hiding states can be chosen to be separable. A single ebit of prior entanglement is not sufficient to break the scheme.

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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