Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-flip effects on the Andreev bound states and supercurrents in a
  superconductor/quantum-dot/superconductor system   We investigate the spin-flip effects on the Andreev bound states and the
supercurrent in a superconductor/quantum-dot/superconductor system
theoretically. The spin-flip scattering in the quantum dot can reverse the
supercurrent flowing through the system, and one $\pi$-junction transition
occurs. By controlling the energy level of quantum dot, the supercurrent is
reversed back and another $\pi$-junction transition appears. The different
influences of the spin-flip scattering and the intradot energy level on the
supercurrent are interpreted in the picture of Andreev bound states.

13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs