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Laboratory simulation of cosmic string formation in the early universe using superfluid Helium 3.

Author(s) : BAEUERLE C., BUNKOV Y. M., FISHER S. N., GODFRIN H., PICKETT G. R.

Type of article: Article

Summary

The formation of cosmic strings during a symmetry-breaking phase transition shortly after the Big Bang is analogous to vortex creation in liquid helium following a rapid transition into the superfluid state. Superfluid vortices have been observed in Helium 4 following rapid quenching to the superfluid state, lending qualitative support to Kibble's contention that topological defects are generated by such phase transitions. Here the authors quantify this process by using an exothermic neutron-induced nuclear reaction to heat small volumes of superfluid Helium 3 above the superfluid transition temperature, and then measuring the deficit in energy released as these regions of normal liquid pass back into the superfluid state.

Details

  • Original title: Laboratory simulation of cosmic string formation in the early universe using superfluid Helium 3.
  • Record ID : 1997-0658
  • Languages: English
  • Source: Nature - vol. 382 - n. 6589
  • Publication date: 1996/07/25
  • Document available for consultation in the library of the IIR headquarters only.

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