Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the possibility of complete revivals after quantum quenches to a
  critical point   In a recent letter, J. Cardy, Phys. Rev. Lett. \textbf{112}, 220401 (2014),
the author made a very interesting observation that complete revivals of
quantum states after quantum quench can happen in a period which is a fraction
of the system size. This is possible for critical systems that can be described
by minimal conformal field theories (CFT) with central charge $c<1$. In this
article, we show that these complete revivals are impossible in microscopic
realizations of those minimal models. We will prove the absence of the
mentioned complete revivals for the critical transverse field Ising chain
analytically, and present numerical results for the critical line of the XY
chain. In particular, for the considered initial states, we will show that
criticality has no significant effect in partial revivals. We also comment on
the applicability of quasi-particle picture to determine the period of the
partial revivals qualitatively. In particular, we detect a regime in the phase
diagram of the XY chain which one can not determine the period of the partial
revivals using the quasi-particle picture.

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The categories of this paper are: physics
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph