Journal Article10.1023/A:1004693014182
Sonic Pulses from Crossed Vorteces in Liquid Helium-Four: A Simulation of High Energy Radiation from Crossed Cosmic Strings
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TL;DR: The crossing and recombination of two cosmic strings, left from the evolution of the early universe, is a likely source of ultra-high energy quanta as mentioned in this paper, and it is proposed that, as an analogue, the crossing of two vortices in superfluid Helium-four might generate sound pulses that would be detectable in a laboratory experiment.
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Abstract: The crossing and recombination of two cosmic strings, left from the evolution of the early universe, is a likely source of ultra-high energy quanta. It is proposed that, as an analogue, the crossing of two vortices in superfluid Helium-four might generate sound pulses that would be detectable in a laboratory experiment. A simple model yields a prediction for the spectrum: quanta per element of solid angle and energy inversely proportional to energy.
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Citations
Characterization of reconnecting vortices in superfluid helium.
TL;DR: This work presents the first experimental observations of reconnection between quantized vortices in superfluid helium by imaging micrometer-sized solid hydrogen particles trapped on quantized vortex cores and inferring the occurrence of reconnections from the motions of groups of recoiling particles.
Sound Emission due to Superfluid Vortex Reconnections
M. Leadbeater,T. Winiecki,David C. Samuels,Carlo F. Barenghi,Carlo F. Barenghi,Charles S. Adams +5 more
TL;DR: By performing numerical simulations based on the Gross-Pitaevskii equation, direct quantitative measurements of the sound energy released due to superfluid vortex reconnections are made and it is shown that energy is emitted in the form of a sound pulse with a wavelength of a few healing lengths.
References
Cosmological Experiments in Superfluid Helium
TL;DR: In this article, an analogy between cosmological strings and vortex lines in the superfluid was discussed, and a cryogenic experiment was conducted to test key elements of the cosmology scenario for string formation.
2K
Cosmic strings
M. B. Hindmarsh,T. W. B. Kibble +1 more
- 19 Nov 1994
TL;DR: Cosmic strings provide a bridge between the physics of the very small and the very large They are predicted by some unified theories of particle interactions If they exist, they may help to explain some of the largest-scale structures seen in the Universe today as mentioned in this paper.
1.4K
Nongravitational decay of cosmic strings
Mark Srednicki,Stefan Theisen +1 more
TL;DR: In this paper, the decay of loops of cosmic string via radiation of nongravitational energy was investigated and it was shown that emission of particles other than gravitons and Goldstone bosons is not significant.
Collapse and amplification of a vortex filament
TL;DR: In this article, a single filament with a variable core size parameter is used to model how a vortex tube breaks down in the Euler equations, and the first singularity is a self-similar collapse which brings two antiparallel pieces of filament together at a point.
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