Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Acoustic phonon-based interaction between coplanar quantum circuits in
  magnetic field   We explore the acoustic phonon-based interaction between two neighboring
coplanar circuits containing semiconductor quantum point contacts in a
perpendicular magnetic field B. In a drag-type experiment, a current flowing in
one of the circuits (unbiased) is measured in response to an external current
in the other. In moderate B the sign of the induced current is determined
solely by the polarity of B. This indicates that the spatial regions where the
phonon emission/reabsorption is efficient are controlled by magnetic field. The
results are interpreted in terms of non-equilibrium transport via skipping
orbits in two-dimensional electron system.

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The categories of this paper are: patt-sol
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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: eess
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The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas