期刊
PHYSICAL REVIEW E
卷 89, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.89.052140
关键词
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资金
- McKnight Foundation
- Hellman Family Faculty Fund
- McDonnell Foundation
- Mary Elizabeth Rennie Endowment for Epilepsy Research
- National Science Foundation [1219199]
- US Army Research Laboratory
- US Army Research Office [W911NF-13-1-0390]
- Div Of Information & Intelligent Systems
- Direct For Computer & Info Scie & Enginr [1219199] Funding Source: National Science Foundation
Information erasure inevitably leads to the generation of heat. Minimizing this dissipation will be crucial for developing small-scale information processing systems, but little is known about the optimal procedures required. We have obtained closed-form expressions for maximally efficient erasure cycles for deletion of a classical bit of information stored by the position of a particle diffusing in a double-well potential. We find that the extra heat generated beyond the Landauer bound is proportional to the square of the Hellinger distance between the initial and final states divided by the cycle duration, which quantifies how far out of equilibrium the system is driven. Finally, we demonstrate close agreement between the exact optimal cycle and the protocol found using a linear response framework.
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