Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Open quantum systems beyond Fermi's golden rule: Diagrammatic expansion
  of the steady-state time-convolutionless master equation   Steady-state observables, such as occupation numbers and currents, are
crucial experimental signatures in open quantum systems. The
time-convolutionless (TCL) master equation, which is both exact and time-local,
is an ideal candidate for the perturbative computation of such observables. We
develop a diagrammatic approach to evaluate the steady-state TCL generator
based on operators rather than superoperators. We obtain the steady-state
occupation numbers, extend our formulation to the calculation of currents, and
provide a simple physical interpretation of the diagrams. We further benchmark
our method on a single non-interacting level coupled to Fermi reservoirs, where
we recover the exact expansion to next-to-leading order. The low number of
diagrams appearing in our formulation makes the extension to higher orders
accessible. Combined, these properties make the steady-state
time-convolutionless master equation an effective tool for the calculation of
steady-state properties in open quantum systems.

26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom