Mixing of charged and neutral Bose condensates at nonzero temperature and magnetic field
Mixing of charged and neutral Bose condensates at nonzero temperature and magnetic field
It is expected that in the interior of compact stars a proton superconductor coexists with and couples to a neutron superfluid. Starting from a field-theoretical model for two complex scalar fields – one of which is electrically charged – we derive a Ginzburg-Landau potential which includes entrainment between the two fluids and temperature effects from thermal excitations of the two scalar fields and the gauge field. The Ginzburg-Landau description is then used for an analysis of the phase structure in the presence of an external magnetic field. In particular, we study the effect of the superfluid on the flux tube phase by computing the various critical magnetic fields and deriving an approximation for the flux tube interaction. As a result, we point out differences to the naive expectations from an isolated superconductor, for instance the existence of a first-order flux tube onset, resulting in a more complicated phase structure in the region between type-I and type-II superconductivity.
Haber, Alexander
e3efa42e-1632-49b5-9fb3-813d8a4c9af3
Schmitt, Andreas
1765159f-255f-45e7-94ea-58c1c883d65f
2017
Haber, Alexander
e3efa42e-1632-49b5-9fb3-813d8a4c9af3
Schmitt, Andreas
1765159f-255f-45e7-94ea-58c1c883d65f
Haber, Alexander and Schmitt, Andreas
(2017)
Mixing of charged and neutral Bose condensates at nonzero temperature and magnetic field.
In EPJ Web of Conferences.
vol. 137,
EDP Sciences.
10 pp
.
(doi:10.1051/epjconf/201713709003).
Record type:
Conference or Workshop Item
(Paper)
Abstract
It is expected that in the interior of compact stars a proton superconductor coexists with and couples to a neutron superfluid. Starting from a field-theoretical model for two complex scalar fields – one of which is electrically charged – we derive a Ginzburg-Landau potential which includes entrainment between the two fluids and temperature effects from thermal excitations of the two scalar fields and the gauge field. The Ginzburg-Landau description is then used for an analysis of the phase structure in the presence of an external magnetic field. In particular, we study the effect of the superfluid on the flux tube phase by computing the various critical magnetic fields and deriving an approximation for the flux tube interaction. As a result, we point out differences to the naive expectations from an isolated superconductor, for instance the existence of a first-order flux tube onset, resulting in a more complicated phase structure in the region between type-I and type-II superconductivity.
Text
1612.01865v1.pdf
- Accepted Manuscript
More information
In preparation date: 5 July 2016
Submitted date: August 2016
Accepted/In Press date: 15 November 2016
e-pub ahead of print date: 22 March 2017
Published date: 2017
Venue - Dates:
Quark Confinement and the Hadron Spectrum XII, , Thessaloniki, Greece, 2016-08-28 - 2016-09-04
Organisations:
Applied Mathematics
Identifiers
Local EPrints ID: 404094
URI: http://eprints.soton.ac.uk/id/eprint/404094
ISSN: 2101-6275
PURE UUID: 9e912453-3611-4d5d-9e3c-85b85723bf4b
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Date deposited: 21 Dec 2016 12:28
Last modified: 16 Mar 2024 04:23
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Author:
Alexander Haber
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