Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical modeling of the central spin problem using the spin coherent
  states P-representation   In this work, we consider decoherence of a central spin by a spin bath. In
order to study the non-perturbative decoherence regimes, we develop an
efficient mean-field-based method for modeling the spin-bath decoherence, based
on the P-representation of the central spin density matrix. The method can be
applied to longitudinal and transversal relaxation at different external
fields. In particular, by modeling large-size quantum systems (up to 16000 bath
spins), we make controlled predictions for the slow long-time decoherence of
the central spin.

27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
2
The categories of this paper are: math