Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Compact, Transportable, Microchip-Based System for High Repetition
  Rate Production of Bose-Einstein Condensates   We present a compact, transportable system that produces Bose-Einstein
condensates (BECs) near the surface of an integrated atom microchip. The system
occupies a volume of 0.4 m^3 and operates at a repetition rate as high as 0.3
Hz. Evaporative cooling in a chip trap with trap frequencies of several kHz
leads to nearly pure condensates containing 1.9x10^4 87Rb atoms. Partial
condensates are observed at a temperature of 1.58(8) \mu K, close to the
theoretical transition temperature of 1.1 \mu K.

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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
26
The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: nlin