论文标题
评论“无损耗的激子量子电池”
Comment on "Loss-Free Excitonic Quantum Battery"
论文作者
论文摘要
在参考[J。 Liu，D。Segal和G. Hanna。 J. Phys。化学C，123，18303（2019）]有一个基于环境相互作用的量子电池的新建议。所研究的系统是一个带有对称性的para-泛环环，该环被打破，以“重新分配能量”，从而在站点之间造成种群失衡。在本文中，系统的动力学是在单启示近似下计算的，并且没有关于其能量学的讨论。我们不讨论作者在单个单激素框架上的方法或数值结果，但我们想指出的是，观察单个兴奋的人群不足以获得有关系统能量学的任何信息。由于无限探针被附着以打破对称性，因此它不仅像作者所建议的那样重新分配能量，而且环境还将能量与系统交换。此外，单启示人群在特定站点的积累并不能确保该站点具有更多的能量，可以提取有用的工作。因此，尽管他们的单次启动人群是正确的，但para-benzene的能量学并不像电池一样。
In Ref. [J. Liu, D. Segal, and G. Hanna. J. Phys. Chem. C, 123, 18303 (2019)] there is a novel proposal of a quantum battery based on environmental interaction. The system studied is a para-Benzene ring with a symmetry that is broken in order to "redistribute the energy" creating a population imbalance between the sites. In this paper, the dynamics of the system is calculated under the single-excitation approximation and there is no discussion about its energetics. We do not discuss the authors' approach or numerical results on the single-excitation framework, but we would like to point out that observing the single-excitation populations is insufficient to obtain any information about the system's energetics. Since an infinite probe is attached to break the symmetries, it not only redistributes the energies as the authors suggest but the environment also exchanges energy with the system. Moreover, the accumulation of a single-excitation population at a specific site does not ensure that this site has more energy that can be extracted to do useful work. Thus, despite their single-excitation populations being correct, the para-Benzene's energetics do not behave as a battery.
