Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological Excitations in Double-Layer Quantum Hall systems   Double-layer quantum Hall systems with spontaneous broken symmetry can
exhibit a novel manybody quantum Hall effect due to the strong interlayer
coherence. When the layer separation becomes close to the critical value,
quantum fluctuations can destroy the interlayer coherence and the quantum Hall
effect will disappear. We calculate the renormalized isospin stiffness $\rho_s$
due to quantum fluctuations within the Hartree-Fock-RPA formalism. The
activation energy of the topological excitations thus obtained demonstrates a
nice qualitative agreement with recent experiment.

26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn