论文标题
通过热力学长度在量子点中删除最小的耗散信息
Minimally dissipative information erasure in a quantum dot via thermodynamic length
论文作者
论文摘要
在这项工作中，我们探讨了热力学长度的使用来改善实验方案的性能。特别是，我们在半导体量子点上以驱动的电子水平实现Landauer擦除，并比较标准方案，其中的标准方案与几何优化的能量及时增加线性增加。后者是通过选择合适的度量结构来获得的，该度量结构对应于缓慢驾驶方案中最佳的有限时间热力学方案。我们从实验上表明，大地驱动器最小化的耗散速度可以减少慢速协议的耗散，并且随着一个人接近完美的擦除而进行了更大的改进。此外，即使协议时间与系统的平衡时间尺度相当，即远离慢速驾驶方式，几何方法也会导致较小的耗散。我们的结果还说明了在单电子设备中，热力学几何形状的基本原理：最佳有限时间热力学方案是那些在过程中具有恒定耗散速率的原理。
In this work we explore the use of thermodynamic length to improve the performance of experimental protocols. In particular, we implement Landauer erasure on a driven electron level in a semiconductor quantum dot, and compare the standard protocol in which the energy is increased linearly in time with the one coming from geometric optimisation. The latter is obtained by choosing a suitable metric structure, whose geodesics correspond to optimal finite-time thermodynamic protocols in the slow driving regime. We show experimentally that geodesic drivings minimise dissipation for slow protocols, with a bigger improvement as one approaches perfect erasure. Moreover, the geometric approach also leads to smaller dissipation even when the time of the protocol becomes comparable with the equilibration timescale of the system, i.e., away from the slow driving regime. Our results also illustrate, in a single-electron device, a fundamental principle of thermodynamic geometry: optimal finite-time thermodynamic protocols are those with constant dissipation rate along the process.
