Theory of generalized Josephson effects
Theory of generalized Josephson effects
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广义约瑟夫森效应理论
DOI：
10.1093/ptep/ptaa088
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发表时间：
2020
影响因子：
3.5
通讯作者：
Beekman Aron J
中科院分区：
文献类型：
--
作者：
鈴木剛;渡邉真莉;魯楊帆;野原実;高木英典;片山尚幸;澤博;藤澤正美;金井輝人;石井順久;板谷治郎;溝川貴司;辛埴;岡﨑浩三;大石進一編著;池田 達彦;Beekman Aron J
直流约瑟夫森效应是超导电流流过两个具有不同序参数（相位）的超导体之间的弱连接。我们制定了任何类型的自发连续对称性破缺的概念。在两个系统之间流动的量是与对称性破缺相关联的零波数Noether电流。交流约瑟夫森效应是由于两个系统之间的能量差引起的电流振荡，该能量差是由施加的不对称化学势的Noether电荷引起的。作为新物理学的一个例子，约瑟夫森效应被预测在两个结晶固体之间，可能作为分离距离中周期性的力来测量。
The DC Josephson effect is the flow of supercurrent across a weak link between two superconductors with different values of their order parameters, the phase. We formulate this notion for any kind of spontaneous continuous symmetry breaking. The quantity that flows between the two systems is the zero-wavenumber Noether current associated with the broken symmetry. The AC Josephson effect is the oscillation of current due to the energy difference between the two systems caused by an imposed asymmetric chemical potential of Noether charge. As an example of novel physics, a Josephson effect is predicted between two crystalline solids, potentially measurable as a force periodic in the separation distance.