| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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Topological Aspects in an Interacting Mixture of a Charged and a Neutral Superfluid in Neutron Stars |
| REN Ji-Rong, GUO Heng, ZHANG Xin-Hui, LI Ran |
| Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000 |
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| Cite this article: |
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REN Ji-Rong, GUO Heng, ZHANG Xin-Hui et al 2009 Chin. Phys. Lett. 26 079701 |
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Abstract By making use of the decomposition of U(1) gauge potential theory and the Φ-mapping method we discuss a mixture of interacting neutral and charged Bose condensates, which is supposed to be realized in the interior of neutron stars in the form of a coexistent neutron superfluid and protonic superconductor. We propose that this system possesses vortex line knotted solitons and the topological charges of vortex lines are characterized by the winding numbers of the Φ-mapping. Furthermore the spatial bifurcation of vortices is also discussed.
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| Keywords:
97.60.Jd
03.75.Lm
11.15.Ex
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Received: 13 October 2008
Published: 02 July 2009
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| PACS: |
97.60.Jd
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(Neutron stars)
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03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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11.15.Ex
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(Spontaneous breaking of gauge symmetries)
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