Journal article
Stability of interlinked neutron vortex and proton flux tube arrays in a neutron star: Equilibrium configurations
LV Drummond, A Melatos
Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2017
Abstract
Three-dimensional, Gross-Pitaevskii equation (GPE) simulations are presented of the interaction between neutron superfluid vortices and proton superconductor flux tubes in a rotating, harmonic trap, representing an idealized model of the outer core of a neutron star. Low-energy states of the neutron condensate are calculated by evolving the GPE in imaginary time in the presence of a prescribed, static, rectilinear flux tube array. The calculations are carried out as a function of the angle between the global magnetic and rotation axes, and the amplitude and sign of the current-current and density couplings between the neutron and proton condensates. It is found that the system is frustrated ..
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Grants
Awarded by Australian Research Council
Funding Acknowledgements
The authors acknowledge helpful discussions with Tapio Simula in the early stages of this work and thank Michele Trenti for carefully reading the manuscript and catching a typographical error in equation (17). We thank the referee for their careful reading of our manuscript and constructive comments. Simulations were conducted using the Multi-modal Australian ScienceS Imaging and Visualisation Environment (MASSIVE) cluster<SUP>6</SUP> at Monash University with CPU time provided by a National Computational Infrastructure Merit Allocation Scheme grant. Support is also provided by the Australian Research Council through a Discovery Project grant and the Centre of Excellence for Gravitational Wave Discovery (OzGrav; CE170100004).