Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Restoring gauge invariance in conventional fluctuation corrections to a
  superconductor   The complete set of diagrams for conventional fluctuation corrections to the
normal state of an ultraclean superconductor is derived using the
functional-integral approach. The standard diagrams which characterize the
fluctuation phase of a superconductor, namely, Aslamazov-Larkin, Maki-Thompson,
and Density of States, are obtained and proved to be insufficient to produce a
gauge-invariant electromagnetic response. An additional diagram is derived, and
it is found to be essential for resolving a problematic and underappreciated
aspect of the conventional fluctuation formalism. It is only with the inclusion
of this additional diagram that the theory is now rendered gauge invariant and
does not display a normal-state Meissner effect. It is shown that not only the
Aslamazov-Larkin term but all of the microscopic diagrams are encapsulated
within a Gaussian-level treatment of the effective action.

0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn