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Quantum fluctuations hinder finite-time information erasure near the Landauer limit
Physical Review Letters ( IF 8.6 ) Pub Date : 
Harry J. D. Miller, Giacomo Guarnieri, Mark T. Mitchison, John Goold

Information is physical but information is also processed in finite time. Where computing protocols are concerned, finite-time processing in the quantum regime can dynamically generate coherence. Here we show that this can have significant thermodynamic implications. We demonstrate that quantum coherence generated in the energy eigenbasis of a system undergoing a finite-time information erasure protocol yields rare events with extreme dissipation. These fluctuations are of purely quantum origin. By studying the full statistics of the dissipated heat in the slow driving limit, we prove that coherence provides a non-negative contribution to all statistical cumulants. Using the simple and paradigmatic example of single bit erasure, we show that these extreme dissipation events yield distinct, experimentally distinguishable signatures.

中文翻译:

量子涨落阻碍了Landauer极限附近的有限时间信息擦除

信息是物理的,但信息也会在有限的时间内处理。在涉及计算协议的地方,量子状态下的有限时间处理可以动态地产生相干性。在这里,我们表明这可能具有重大的热力学含义。我们证明了在经历有限时间信息擦除协议的系统的能量本征基础中产生的量子相干性会产生极少的事件,并具有极端的耗散性。这些波动纯粹是量子起源。通过研究慢速行驶极限下的散热量的完整统计数据,我们证明了相干性对所有统计累积量都提供了非负的贡献。使用单个位擦除的简单示例性例子,我们表明这些极端耗散事件会产生不同的,实验上可区分的签名。
更新日期:2020-09-18
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