Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic and non-relativistic quantum Brownian motion in an
  anisotropic dissipative medium   Using a minimal-coupling-scheme we investigate the quantum Brownian motion of
a particle in an anisotropic-dissipative-medium under the influence of an
arbitrary potential in both relativistic and non-relativistic regimes. A
general quantum Langevin equation is derived and explicit expressions for
quantum-noise and dynamical variables of the system are obtained. The equations
of motion for the canonical variables are solved explicitly and an expression
for the radiation-reaction of a charged particle in the presence of a
dissipative-medium is obtained. Some examples are given to elucidate the
applicability of this approach.

10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph