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arXiv 2104.01341cs.ITmath.IT
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反馈能量学在记忆消除中的应用

Energetics of Feedback: Application to Memory Erasure

Harish Doddi, Saurav Talukdar, Murti Salapaka

摘要:

Landauer的擦除原理指出,任何单比特存储器的不可逆擦除协议都需要至少$k_B T ln2.$的工作。最近的概念实验证明,可以设计出工作接近Landauer极限的擦除协议。在反馈下,位的状态可以测量,位擦除所需的工作可以低于$k_B T ln2.$在这篇文章中,我们分析了能量的反馈启用擦除,同时将实验实现的内存和位擦除协议,承认失败的概率的缺陷。我们描绘的作用,测量的不确定性和它的影响的工作和熵变化的反馈为基础的擦除。我们定量地表明,兰道尔极限和最小平均工作之间的赤字需要在基于反馈的擦除占测量和存储器的状态之间的互信息,同时将固有的缺陷在任何实现。我们通过实验证明了使用光场实现的存储器和擦除协议的分析结果。

英文摘要:

Landauer's erasure principle states that any irreversible erasure protocol of a single bit memory needs work of at least $k_B T ln2.$ Recent proof of concept experiments has demonstrated that the erasure protocols with work close to the Landauer limit can be devised. Under feedback, where the state of the bit can be measured, the work needed for bit erasure can be lower than $k_B T ln2.$ In this article, we analyze the energetics of feedback enabled erasure, while incorporating the imperfections of experimentally realized memory and bit erasure protocols that admit failure probabilities. We delineate the role of uncertainty in measurements and its effects on the work and entropy changes for a feedback-based erasure. We quantitatively demonstrate that the deficit between the Landauer limit and the minimum average work needed in a feedback-based erasure is accounted for by the mutual information between the measurement and the state of the memory, while incorporating the imperfections inherent in any realization. We experimentally demonstrate analysis results on a memory and erasure protocol realized using optical fields.

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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