Microstructure of He II in the presence of boundaries
| Autor: | Tomchenko, Maksim D. |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Ukr. J. Phys. 59, 123 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.15407/ujpe59.02.0123 |
| Popis: | We have studied the microstructure of a system of interacting Bose particles under zero boundary conditions and have found two possible orderings. One ordering is traditional and is characterized by the Bogolyubov dispersion law E^2 = (h^2 k^2/2m)^{2} + qn\nu(k)[h^2 k^2/m] (with q=1) at a weak interaction. The second one is new and is characterized by the same dispersion law, but with q=2^{-f}, where $f$ is the number of noncyclic coordinates. At a weak interaction, the ground-state energy is less for the new solution. The boundaries affect the bulk microstructure due to the difference of the topologies of closed and open systems. Comment: 17 pages, 2 figures, v5: explanations are revised; v6: journal version |
| Databáze: | arXiv |
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