Topological aspects in a two-component Bose condensed system in neutron star |
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| Authors: | Ren Ji-Rong and Guo Heng |
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| Affiliation: | Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000, China |
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| 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 $\phi$-mapping. |
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| Keywords: | neutron stars topological
defects two-component Bose condensed system |
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