Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of dissipation on the decay-rate phase transition   A general condition for sharp transition of decay rate from quantum to
thermal regimes is derived in dissipative tunneling models when position
dependent mass is involved. It is shown that the effect of dissipation in
general changes the order of the phase transition. Especially, for the models
with constant mass the Ohmic dissipation enlarges the range of parameters for
first-order phase transitions. In the case of second-order phase transition the
Ohmic dissipation suppresses the decay rate near the transition
temperature(T_c). For the super-Ohmic case the dissipation yields an opposite
effects to the Ohmic dissipation within exponential approximation.

23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs