Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical quantum phase transitions in a spin chain with deconfined
  quantum critical points   We analytically and numerically study the Loschmidt echo and the dynamical
order parameters in a spin chain with a deconfined phase transition between a
dimerized state and a ferromagnetic phase. For quenches from a dimerized state
to a ferromagnetic phase, we find that the model can exhibit a dynamical
quantum phase transition characterized by an associating dimerized order
parameters. In particular, when quenching the system from the Majumdar-Ghosh
state to the ferromagnetic Ising state, we find an exact mapping into the
classical Ising chain for a quench from the paramagnetic phase to the classical
Ising phase by analytically calculating the Loschmidt echo and the dynamical
order parameters. By contrast, for quenches from a ferromagnetic state to a
dimerized state, the system relaxes very fast so that the dynamical quantum
transition may only exist in a short time scale. We reveal that the dynamical
quantum phase transition can occur in systems with two broken symmetry phases
and the quench dynamics may be independent on equilibrium phase transitions.

11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph