Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Linear Response of Zero-Resistance States   A two-dimensional electron system in the presence of a magnetic field and
microwave irradiation can undergo a phase transition towards a zero-resistance
state. A widely used model predicts the zero-resistance state to be a domain
state, which responds to applied dc voltages or dc currents by slightly
changing the domain structure. Here we propose an alternative response
scenario, according to which the domain pattern remains unchanged.
Surprisingly, a fixed domain pattern does not destroy zero resistance, provided
that the resistance is direction independent. Otherwise, if the symmetry of the
domain pattern allows a direction dependence of the resistance, the domain
state can be dissipative. We give examples for both situations and simulate the
response behavior numerically.

2
The categories of this paper are: math
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph