Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatial distribution of electric field of equal probability quantum
  walks based on three-level quantum system   Based on the three-level quantum system, when it is in resonance, according
to any two lattice points closest to Hamiltonian coupling, electrons transition
from high energy level to low energy level and release photons; Or absorb
photons and transition from low energy level to high energy level, thus
obtaining the physical process of quantum walking along a straight line under
the condition of equal probability. Then, the optical radiation in the quantum
walk is mapped into a Gaussian pulse of the electric field, and the Maxwell's
equation is solved by the three dimensional finite-difference time-domain
method to obtain the spatial electric distributio. Finally, the physical
process ofquantum walking on two parallel lines is further discussed, involving
some physical properties such as electromagnetic coupling or coherence, quantum
state exchange and so on. The electric field coupling between two lines can be
calculated by FDTD, which provides a useful tool for the design and analysis of
quantum devices.

21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th