Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bulk Tunneling at Integer Quantum Hall Transitions   The tunneling into the {\em bulk} of a 2D electron system (2DES) in strong
magnetic field is studied near the integer quantum Hall transitions. We present
a nonperturbative calculation of the tunneling density of states (TDOS) for
both Coulomb and short-ranged electron-electron interactions. In the case of
Coulomb interaction, the TDOS exhibits a 2D quantum Coulomb gap behavior,
$\nu(\ve)=C_Q\ave/e^4$, with $C_Q$ a nonuniversal coefficient of quantum
mechanical origin. For short-ranged interactions, we find that the TDOS at low
bias follows $\nu(\ve)/\nu (0)=1+(\ave/\ve_0)^\gamma$, where $\gamma$ is a
universal exponent determined by the scaling dimension of short-ranged
interactions.

16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin