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arXiv quant-ph/0205078quant-ph
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纠缠和关联在密集编码中的作用

Role of entanglement and correlations in dense coding

Mario Ziman, Vladimir Buzek

摘要:

通常认为量子密集编码是由于两方之间的量子纠缠引起的。我们表明,这种现象有其起源于{ \em关联}之间的两方,而不是简单的纠缠。为了证明我们的论点,我们评估了两种情况下的无噪声信道的容量:(1)当Bob仅对从Alice接收到的粒子执行测量时,以及(2)当他利用密集编码的全部潜力时,即,他对接收到的粒子和他在通信之前具有的粒子执行测量。我们还提出了一个简单的经典的情况下,这可能是一个原型的密集编码。我们也推广我们的结果qudits。

英文摘要:

Usually it is assumed that quantum dense coding is due to quantum entanglement between two parties. We show that this phenomenon has its origin in {\em correlations} between two parties rather than simply in entanglement. In order to justify our argument we evaluate a capacity of the noiseless channel for two cases: (1) when Bob performs measurement just on the particle received from Alice and (2) in the case when he utilizes the whole potential of the dense coding, that is, he performs the measurement on the received particle and the particle he had prior to the communication. We also present a simple classical scenario which might serve as a prototype of the dense coding. We generalize our results also for qudits.

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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