Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Titanium Nitride Films for Ultrasensitive Microresonator Detectors   Titanium nitride (TiNx) films are ideal for use in superconducting
microresonator detectors because: a) the critical temperature varies with
composition (0 < Tc < 5 K); b) the normal-state resistivity is large, \rho_n ~
100 $\mu$Ohm cm, facilitating efficient photon absorption and providing a large
kinetic inductance and detector responsivity; and c) TiN films are very hard
and mechanically robust. Resonators using reactively sputtered TiN films show
remarkably low loss (Q_i > 10^7) and have noise properties similar to
resonators made using other materials, while the quasiparticle lifetimes are
reasonably long, 10-200 $\mu$s. TiN microresonators should therefore reach
sensitivities well below 10^-19 WHz^(-1/2).

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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
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The categories of this paper are: stat
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ