Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral state conversion in a levitated micromechanical oscillator with
  in situ control of parameter loops   Physical systems with gain and loss can be described by a non-Hermitian
Hamiltonian, which is degenerated at the exceptional points (EPs). Many new and
unexpected features have been explored in the non-Hermitian systems with a
great deal of recent interest. One of the most fascinating features is that,
chiral state conversion appears when one EP is encircled dynamically. Here, we
propose an easy-controllable levitated microparticle system that carries a pair
of EPs and realize slow evolution of the Hamiltonian along loops in the
parameter plane. Utilizing the controllable rotation angle, gain and loss
coefficients, we can control the structure, size and location of the loops in
situ. We demonstrate that, under the joint action of topological structure of
energy surfaces and nonadiabatic transitions (NATs), the chiral behavior
emerges both along a loop encircling an EP and even along a straight path away
from the EP. This work broadens the range of parameter space for the chiral
state conversion, and proposes a useful platform to explore the interesting
properties of exceptional points physics.

27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin