Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Atom Trap Relying on Optical Pumping   We have investigated a new radiation pressure trap which relies on optical
pumping and does not require any magnetic field. It employs six circularly
polarized divergent beams and works on the red of a $J_{g} \longrightarrow
J_{e} = J_{g} + 1$ atomic transition with $J_{g} \geq 1/2$. We have
demonstrated this trap with cesium atoms from a vapour cell using the 852 nm
$J_{g} = 4 \longrightarrow J_{e} = 5$ resonance transition. The trap contained
up to $3 \cdot 10^{7}$ atoms in a cloud of $1/\sqrt{e}$ radius of 330 $\mu$m.

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The categories of this paper are: astro-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc