Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic-field gradiometer based on ultracold collisions   We present a detailed analysis of the usefulness of ultracold atomic
collisions for sensing the strength of an external magnetic field as well as
its spatial gradient. The core idea of the sensor, which we recently proposed
in K. Jachymski \emph{et al.}, Phys. Rev. Lett. {\bf 120}, 013401 (2018), is to
probe the transmission of the atoms through a set of quasi-one-dimensional
waveguides that contain an impurity. Magnetic field-dependent interactions
between the incoming atoms and the impurity naturally lead to narrow resonances
that can act as sensitive field probes since they strongly affect the
transmission. We illustrate our findings with concrete examples of experimental
relevance, demonstrating that a sensitivity of the order of 1 nT for the field
strength and $100\,\mathrm{nT}/\mathrm{mm}$ for the gradient can be reached
using our scheme.

17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph