Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pushing the limits of the reaction-coordinate mapping   The reaction-coordinate mapping is a useful technique to study complex
quantum dissipative dynamics into structured environments. In essence, it aims
to mimic the original problem by means of an 'augmented system', which includes
a suitably chosen collective environmental coordinate---the 'reaction
coordinate'. This composite then couples to a simpler 'residual reservoir' with
short-lived correlations. If, in addition, the residual coupling is weak, a
simple quantum master equation can be rigorously applied to the augmented
system, and the solution of the original problem just follows from tracing out
the reaction coordinate. But, what if the residual dissipation is strong? Here
we consider an exactly solvable model for heat transport---a two-node linear
"quantum wire" connecting two baths at different temperatures. We allow for a
structured spectral density at the interface with one of the reservoirs and
perform the reaction-coordinate mapping, writing a perturbative master equation
for the augmented system. We find that: (a) strikingly, the stationary state of
the original problem can be reproduced accurately by a weak-coupling treatment
even when the residual dissipation on the augmented system is very strong; (b)
the agreement holds throughout the entire dynamics under large residual
dissipation in the overdamped regime; (c) and that such master equation can
grossly overestimate the stationary heat current across the wire, even when its
non-equilibrium steady state is captured faithfully. These observations can be
crucial when using the reaction-coordinate mapping to study the largely
unexplored strong-coupling regime in quantum thermodynamics.

8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat