Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Periodic dynamics in superconductors induced by an impulsive optical
  quench   A number of experiments have evidenced signatures of enhanced superconducting
correlations after photoexcitation. Initially, these experiments were
interpreted as resulting from quasi-static changes in the Hamiltonian
parameters, for example, due to lattice deformations or melting of competing
phases. Yet, several recent observations indicate that these conjectures are
either incorrect or do not capture all the observed phenomena, which include
reflectivity exceeding unity, large shifts of Josephson plasmon edges, and
appearance of new peaks in terahertz reflectivity. These observations can be
explained from the perspective of a Floquet theory involving a periodic drive
of system parameters, but the origin of the underlying oscillations remains
unclear. In this paper, we demonstrate that following incoherent
photoexcitation, long-lived oscillations are generally expected in
superconductors with low-energy Josephson plasmons, such as in cuprates or
fullerene superconductor K$_3$C$_{60}$. These oscillations arise from the
parametric generation of plasmon pairs due to pump-induced perturbation of the
superconducting order parameter. We show that this bi-plasmon response can
persist even above the transition temperature as long as strong superconducting
fluctuations are present. Our analysis offers a robust framework to understand
light-induced superconducting behavior, and the predicted bi-plasmon
oscillations can be directly detected using available experimental techniques.

6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci