Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Fundamental dHvA Frequency in Canonical Low-Dimensional Fermi
  Liquids   We show that a new fundamental period $P_{f}$ of dHvA oscillations, which
appears along with other ``forbidden'' combination frequencies in a multi-band
canonical Fermi-liquid, is very robust with respect to a finite smearing of
Landau levels and a background of non-quantized states. We analyse the
possibility of measuring small Fermi surface pockets with the use of the
``forbidden'' frequencies.

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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: q-alg