Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultrafast pump-probe spectroscopic signatures of superconducting and
  pseudogap phases in YBa2Cu3O7-{\delta} films   Femtosecond pump-probe spectroscopy is applied to identify transient optical
signatures of phase transitions in optimally doped YBa2Cu3O7-{\delta} films. To
elucidate the dynamics of superconducting and pseudogap phases, the slow
thermal component is removed from the time-domain traces of photo-induced
reflectivity in a high-flux regime with low frequency pulse rate. The rescaled
data exhibit distinct signatures of the phase separation with abrupt changes at
the onsets of TSC and TPG in excellent agreement with transport data. Compared
to the superconducting phase, the response of the pseudogap phase is
characterized by the strongly reduced reflectivity change accompanied by a
faster recovery time.

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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc