A note on the analogy between superfluids and cosmology
| Autor: | Naddeo, A., Scelza, G. |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Mod.Phys.Lett.B Vol. 24, No. 06 : pp. 513-520 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1142/S0217984910022573 |
| Popis: | A new analogy between superfluid systems and cosmology is here presented, which relies strongly on the following ingredient: the back-reaction of the vacuum to the quanta of sound waves. We show how the presence of thermal phonons, the excitations above the quantum vacuum for $T> 0$, enable us to deduce an hydrodynamical equation formally similar to the one obtained for a perfect fluid in a Universe obeying the Friedmann-Robertson-Walker metric. Comment: Accepted for publication in Modern Physics Letters B |
| Databáze: | arXiv |
| Externí odkaz: |
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