Proposal for testing the electric Aharonov-Bohm effect with superconductors
Proposal for testing the electric Aharonov-Bohm effect with superconductors
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DOI：
10.1103/physrevb.101.174504
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发表时间：
2019-09
影响因子：
3.7
通讯作者：
Thomas C. Bachlechner;M. Kleban
中科院分区：
文献类型：
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作者：
Thomas C. Bachlechner;M. Kleban
带电物质的波函数的相位对电势值敏感，即使物质从未进入任何电磁场不为零的区域。尽管具有基本特征，但这种典型的电阿哈罗诺夫-玻姆效应显然从未被观察到。我们提出了一个通过电势与超导序参数的耦合来检测电势的实验。两个超导体之间的电势差将引起相对相移，即使没有电磁场作用在超导体上，并且即使电势差后来减小到零，也可以通过直流约瑟夫森效应观察到相对相移。这是一种电磁记忆效应，可以直接证明电势的物理意义。
The phase of the wave function of charged matter is sensitive to the value of the electric potential, even when the matter never enters any region with nonvanishing electromagnetic fields. Despite its fundamental character, this archetypal electric Aharonov-Bohm effect has evidently never been observed. We propose an experiment to detect the electric potential through its coupling to the superconducting order parameter. A potential difference between two superconductors will induce a relative phase shift that is observable via the DC Josephson effect even when no electromagnetic fields ever act on the superconductors, and even if the potential difference is later reduced to zero. This is a type of electromagnetic memory effect, and would directly demonstrate the physical significance of the electric potential.