Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability and The Existence of Coherent Structure in Demixed State of
  Binary BEC   From a linear stability analysis of the Gross Pitaevskii equation for binary
Bose Einstein condensates, it is found that the uniform state becomes unstable
to a periodic perturbation of wave number k if k exceeds a critical value kc.
However we find that a stationary spatially periodic state does not exist. We
show the existence of pulse type solutions, when the pulse structure for one
condensate is strongly influenced by the presence of the other condensate.

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The categories of this paper are: chem-ph
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: funct-an
2
The categories of this paper are: math
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys