Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Efficient simulation of finite-temperature open quantum systems   Chain-mapping techniques in combination with the time-dependent density
matrix renormalization group are a powerful tool for the simulation of
open-system quantum dynamics. For finite-temperature environments, however,
this approach suffers from an unfavorable algorithmic scaling with increasing
temperature. We prove that the system dynamics under thermal environments can
be non-perturbatively described by temperature-dependent system-environmental
couplings with the initial environment state being in its pure vacuum state,
instead of a mixed thermal state. As a consequence, as long as the initial
system state is pure, the global system-environment state remains pure at all
times. The resulting speedup and relaxed memory requirements of this approach
enable the efficient simulation of open quantum systems interacting with highly
structured environments in any temperature range, with applications extending
from quantum thermodynamics to quantum effects in mesoscopic systems.

14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc