Abstract By making use of Duan--Ge's decomposition theory of gauge potential
and the topological current theory proposed by Prof. Duan
Yi-Shi, we study a two-component superfluid Bose condensed system,
which is supposed to be realized in the interior of neutron stars in
the form of the coexistence of a neutron superfluid and a protonic
superconductor. We propose that this system possesses vortex lines.
The topological charges of the vortex lines are characterized by the
Hopf indices and the Brower degrees of φ-mapping.
Received: 14 October 2008
Published: 20 August 2009
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10275030) and Cuiying
Project of Lanzhou University (Grant No 225000-582404).
Cite this article:
Ren Ji-Rong, Guo Heng Topological aspects in a two-component Bose condensed system in neutron star 2009 Chin. Phys. B 18 03379