Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics in an exact solvable quantum magnet: benchmark for quantum
  computer   Quantum magnets are never short of novel and fascinating dynamics, yet its
simulation by classical computers requires exponentially-scaled computation
resources, which renders the research on large-scale many-body dynamics
fiendishly difficult. In this letter, we explore the dynamic behavior of 2D
large-scale ferromagnetic J1-J2 Heisenberg model both theoretically and
experimentally. First, the analytical solution of magnon dynamics is obtained
to show an obvious ballistic propagation of magnon, which is typical for
quantum walk. Then, we verify the dynamic behavior of the system through
numerical approach of exact diagonalization and tensor network method. We also
calculate out-of-time ordered correlators and butterfly velocities among
different lattice points, finding that they can well depict the competition
between different couplings. Finally, a quantum walk experiment is designed and
conducted on the basis of IBM programmable quantum processors, and the
experimental results are in consistence with our theoretical predictions. Since
the analytical results can be used, in principle, to predict the behavior of
large-scale quantum many-body systems and even those infinitely large, this
work will help facilitate further research on quantum walk and quantum
many-body dynamics in large-scale lattice systems, guide future design of
quantum computers, as well as popularize quantum computers until they are known
and available to every household in the world.

27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci