Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Demonstration of ultra-low noise equivalent power using a longitudinal
  proximity effect transition-edge sensor   Future far-infrared astronomy missions will need large arrays of detectors
with exceptionally low noise-equivalent power (NEP), with some mission concepts
calling for thousands of detectors with NEPs below a few $\times 10^{-20}$
W/$\sqrt{\mathrm{Hz}}$. Though much progress has been made toward meeting this
goal, such detector systems do not exist today. In this work, we present a
device that offers a compelling path forward: the longitudinal proximity effect
(LoPE) transition-edge sensor (TES). With a chemically-stable and
mechanically-robust architecture, the LoPE TES we designed, fabricated, and
characterized also exhibits unprecedented sensitivity, with a measured
electrical NEP of $8 \times 10^{-22}$ W/$\sqrt{\mathrm{Hz}}$. This represents a
>100x advancement of the state-of-the-art, pushing TES detectors into the
regime where they may be employed the achieve to goals of even the most
ambitious large and cold future space instruments.

5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas