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Chin. Phys. B, 2009, Vol. 18(8): 03379    DOI: 10.1088/1674-1056/18/8/043

Topological aspects in a two-component Bose condensed system in neutron star

Ren Ji-Rong, Guo Heng
Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000, China
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.
Keywords:  neutron stars      topological defects      two-component Bose condensed system     
Received:  14 October 2008      Published:  20 August 2009
PACS:  97.60.Jd (Neutron stars)  
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

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