Electromagnetic response of superconductors in the presence of multiple collective modes
Electromagnetic response of superconductors in the presence of multiple collective modes
Collective-mode fluctuations play an essential role in ensuring the electromagnetic response of superfluids is gauge invariant. The contribution of these fluctuations, however, is known to drop out from the Meissner response of uniform superfluids. The same phenomenon is not so established in the context of nonuniform superfluids. To clarify this …