论文标题
对称诱导的偶数/奇偶校验和热泵
Symmetry-induced even/odd parity in charge and heat pumping
论文作者
论文摘要
结果表明，连接到金属储层的浮子系统中存在离散对称性，这在电荷上具有一定的奇偶校验，并随着储层的化学潜力（$μ$）的函数而定。特别是，当颗粒 - 孔对称性（PHS）保持时，电荷的泵送（热）是$μ$的奇数（偶数）函数。鉴于，如果仅存在PHS和均等对称的乘积，则电荷（热）的泵送（奇数）为$μ$。我们的结果还扩展到了其他统一对称性的存在，并提供了一个简单的标准，用于逆转（或维持）流动方向。我们使用Su-Schrieffer-Heeger模型的两个变体在时间周期性扰动下说明了我们的发现。
It is shown that the presence of discrete symmetries in Floquet systems connected to metallic reservoirs imprints a definite parity on the charge and heat pumping as a function of the reservoir's chemical potential, $μ$. In particular, when particle-hole symmetry (PHS) holds, the pumping of charge (heat) is an odd (even) function of $μ$. Whereas, if only the product of PHS and parity symmetry is present, pumping of charge (heat) is even (odd) in $μ$. Our results also extend to the presence of other unitary symmetries and provide a simple criterion for reversing (or maintaining) the direction of the flow. We illustrate our findings using two variants of the Su-Schrieffer-Heeger model under a time-periodic perturbation.
