High-Precision Test of Landauer's Principle in a Feedback Trap
High-Precision Test of Landauer's Principle in a Feedback Trap
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DOI：
10.1103/physrevlett.113.190601
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发表时间：
2014-11-04
影响因子：
8.6
通讯作者：
Bechhoefer, John
中科院分区：
文献类型：
--
作者：
Jun, Yonggun;Gavrilov, Momcilo;Bechhoefer, John
我们证实了Landauer的1961年的假设，即在一个系统中可能的宏观状态的数量减少了2倍，需要至少kT ln 2的工作。我们的实验使用了一个胶体粒子在一个时间依赖性，虚拟的反馈陷阱创建的潜力，以实现兰道尔的擦除操作。在控制实验中，不减少系统状态数量的类似操作可以可逆地进行。因此，擦除信息需要工作。在单个循环中，擦除的功可以低于Landauer极限，与Jarzynski等式一致。
We confirm Landauer's 1961 hypothesis that reducing the number of possible macroscopic states in a system by a factor of 2 requires work of at least kT ln 2. Our experiment uses a colloidal particle in a time-dependent, virtual potential created by a feedback trap to implement Landauer's erasure operation. In a control experiment, similar manipulations that do not reduce the number of system states can be done reversibly. Erasing information thus requires work. In individual cycles, the work to erase can be below the Landauer limit, consistent with the Jarzynski equality.