Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermal detection of single e-h pairs in a biased silicon crystal
  detector   We demonstrate that individual electron-hole pairs are resolved in a 1 cm$^2$
by 4 mm thick silicon crystal (0.93 g) operated at $\sim$35 mK. One side of the
detector is patterned with two quasiparticle-trap-assisted
electro-thermal-feedback transition edge sensor (QET) arrays held near ground
potential. The other side contains a bias grid with 20\% coverage. Bias
potentials up to $\pm$ 160 V were used in the work reported here. A fiber optic
provides 650~nm (1.9 eV) photons that each produce an electron-hole ($e^{-}
h^{+}$) pair in the crystal near the grid. The energy of the drifting charges
is measured with a phonon sensor noise $\sigma$ $\sim$0.09 $e^{-} h^{+}$ pair.
The observed charge quantization is nearly identical for $h^+$'s or $e^-$'s
transported across the crystal.

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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph