Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum speed limit for a mixed initial state   A unified bound on the quantum speed limit is obtained for open quantum
systems with the mixed initial state by utilizing the function of relative
purity proposed in [Phys. Rev. Lett. 120, 060409 (2018)]. As applications, it
is found that the quantum speed limit bound for the damped Jaynes-Cumming model
is determined by the competition among the non-Markovianity, the population of
initial excited state and the initial-state coherence, which shows that the
population of initial excited state and the coherence of initial state can
sharp the quantum speed limit despite that the non-Markovian effects can
accelerate the evolution of open quantum system. For the dephasing model, a
simple factorization law with the initial-state coherence shows that the
quantum speed limit is only governed by the competition between the
non-Markovianity and the coherence of the initial state.

21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc