Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong coupling of microwave photons to antiferromagnetic fluctuations
  in an organic magnet   Coupling between a crystal of di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium
radicals and a superconducting microwave resonator is investigated in a circuit
quantum electrodynamics (circuit QED) architecture. The crystal exhibits
paramagnetic behavior above 4~K, with antiferromagnetic correlations appearing
below this temperature, and we demonstrate strong coupling at base temperature.
The magnetic resonance acquires a field angle dependence as the crystal is
cooled down, indicating anisotropy of the exchange interactions. These results
show that multispin modes in organic crystals are suitable for circuit QED,
offering a platform for their coherent manipulation. They also utilize the
circuit QED architecture as a way to probe spin correlations at low
temperature.

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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
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The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con