Non-Riemannian effective spacetime effects on Hawking radiation in superfluids

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dc.creatorde Andrade, L. C. Garcia
dc.date2005-01-10
dc.date.accessioned2026-07-07T03:29:19Z
dc.date.available2026-07-07T03:29:19Z
dc.descriptionRiemannian effective spacetime description of Hawking radiation in $^{3}He-A$ superfluids is extended to non-Riemannian effective spacetime. An example is given of non-Riemannian effective geometry of the rotational motion of the superfluid vacuum around the vortex where the effective spacetime Cartan torsion can be associated to the Hawking giving rise to a physical interpretation of effective torsion recently introduced in the literature in the form of an acoustic torsion in superfluid $^{4}He$ (PRD-70(2004),064004). Curvature and torsion singularities of this $^{3}He-A$ fermionic superfluid are investigated. This Lense-Thirring effective metric, representing the superfluid vacuum in rotational motion, is shown not support Hawking radiation when the isotropic $^{4}He$ is restored at far distances from the vortex axis. Hawking radiation can be expressed also in topological solitons (moving domain walls) in fermionic superfluids in non-Riemannian (teleparallel) $(1+1)$ dimensional effective spacetime. A teleparallel solution is proposed where the quasiparticle speed is determined from the teleparallel geometry.
dc.descriptionLatex file
dc.identifierhttps://arxiv.org/abs/gr-qc/0501028
dc.identifierhttp://arxiv.org/abs/gr-qc/0501028
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/35173
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleNon-Riemannian effective spacetime effects on Hawking radiation in superfluids
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