Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous dynamical phase in quantum spin chains with long-range
  interactions   The existence or absence of non-analytic cusps in the Loschmidt-echo return
rate is traditionally employed to distinguish between a regular dynamical phase
(regular cusps) and a trivial phase (no cusps) in quantum spin chains after a
global quench. However, numerical evidence in a recent study [J. C. Halimeh and
V. Zauner-Stauber, arXiv:1610.02019] suggests that instead of the trivial phase
a distinct anomalous dynamical phase characterized by a novel type of
non-analytic cusps occurs in the one-dimensional transverse-field Ising model
when interactions are sufficiently long-range. Using an analytic semiclassical
approach and exact diagonalization, we show that this anomalous phase also
arises in the fully-connected case of infinite-range interactions, and we
discuss its defining signature. Our results show that the transition from the
regular to the anomalous dynamical phase coincides with Z2-symmetry breaking in
the infinite-time limit, thereby showing a connection between two different
concepts of dynamical criticality. Our work further expands the dynamical phase
diagram of long-range interacting quantum spin chains, and can be tested
experimentally in ion-trap setups and ultracold atoms in optical cavities,
where interactions are inherently long-range.

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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: physics
11
The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: funct-an