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Andreev-Bashkin effect and knot solitons in an interacting mixture of a charged and a neutral superfluid with possible relevance for neutron stars
2004 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Vol. 70, no 4Article in journal (Refereed) Published
Abstract [en]

We discuss a mixture of interacting neutral and charged Bose condensates, which is supposed being realized in the interior of neutron stars in the form of a coexistent neutron superfluid and protonic superconductor. We show that in this system, besides ordinary vortices of the S-1-->S-1 map, the neutron condensate also allows for (meta)stable finite-length knotted solitons, which are characterized by a nontrivial Hopf invariant and in some circumstances may be stabilized by a Faddeev-Skyrme term induced by the drag effect. We also consider a helical protonic flux tube in this system and show that, in contrast, it does not induce a Faddeev-Skyrme term.

Place, publisher, year, edition, pages
2004. Vol. 70, no 4
Keyword [en]
yang-mills theory, classical field-theory, crust superfluid, vortex phase, vortices, superconductors, condensation, intersection, variables, glitches
URN: urn:nbn:se:kth:diva-23724DOI: 10.1103/PhysRevD.70.043001ISI: 000223859700010OAI: diva2:342423
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Babaev, Egor
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