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Boost-invariant superfluid flows
Nordita SU.
2022 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 9, article id 205Article in journal (Refereed) Published
Abstract [en]

We present some exact solutions to the ideal hydrodynamics of a relativistic superfluid with an almost-conformal equation of state. The solutions have stress tensors which are invariant under Lorentz boosts in one direction, and represent superfluid generalisations of the Bjorken and Gubser flows. We also study corrections to the flows in first-order hydrodynamics, arguing that dissipation is dominated by the shear viscosity. We present some simple numerical solutions for these viscous corrections. Finally, we estimate the size of corrections to the flows arising when the spontaneously broken U(1) symmetry responsible for superfluidity is only approximate, giving the corresponding Gold-stone boson a small non-zero mass. We find that the massless solutions can still provide good approximations at sufficiently small spatial rapidities.

Place, publisher, year, edition, pages
Springer Nature , 2022. no 9, article id 205
Keywords [en]
Field Theory Hydrodynamics, Spontaneous Symmetry Breaking
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Identifiers
URN: urn:nbn:se:kth:diva-319834DOI: 10.1007/JHEP09(2022)205ISI: 000857829900007Scopus ID: 2-s2.0-85138671899OAI: oai:DiVA.org:kth-319834DiVA, id: diva2:1702901
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QC 20221012

Available from: 2022-10-12 Created: 2022-10-12 Last updated: 2023-09-25Bibliographically approved

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