Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonperturbative master equation solution of central spin dephasing
  dynamics   We solve the long-standing central spin problem for a general set of
inhomogeneous bath couplings and a large class of initial bath states. We
compute the time evolution of the coherence of a central spin coupled to a spin
bath by resumming all orders of the time-convolutionless master equation, thus
avoiding the need to assume weak coupling to the bath. The fully quantum,
non-Markovian solution is obtained in the large-bath limit and is valid up to a
timescale set by the largest coupling constant. Our result captures the full
decoherence of an electron spin qubit coupled to a nuclear spin bath in a GaAs
quantum dot for experimentally relevant parameters. In addition, our solution
is quite compact and can readily be used to make quantitative predictions for
the decoherence process and to guide the design of nuclear state preparation
protocols.

22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess