Computer simulations of excitations in quantum solids - Sorkin, Viacheslav
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Using path-integral Monte Carlo and the maximum entropy method, we calculate the dynamic structure factor of solid 4He in the bcc phase at a finite temperature. Both the single-phonon contribution to the dynamic structure factor and the total dynamic structure factor are evaluated. From the dynamic structure factor, we obtain the phonon dispersion relations along the main crystalline directions, [001], [011], and [111]. We calculate both the longitudinal and transverse phonon branches. We discuss the differences between dispersion relations resulting from the single-phonon part versus the…mehr

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Produktbeschreibung
Using path-integral Monte Carlo and the maximum entropy method, we calculate the dynamic structure factor of solid 4He in the bcc phase at a finite temperature. Both the single-phonon contribution to the dynamic structure factor and the total dynamic structure factor are evaluated. From the dynamic structure factor, we obtain the phonon dispersion relations along the main crystalline directions, [001], [011], and [111]. We calculate both the longitudinal and transverse phonon branches. We discuss the differences between dispersion relations resulting from the single-phonon part versus the total dynamic structure factor. In addition, we evaluate the formation energy of a vacancy.
Autorenporträt
Currently Research Engineer at the IHPC, EM Dept., Singapore. Postdoctoral Associate, 2006-2008, AEM, University of Minnesota, Advisers: E.Tadmor and R.Elliot. Ph.D. 2000-2006 : Physics Department, Technion, Advisers: J.Adler and E.Polturak. Diploma: Physics Department, M. Lomonosov Moscow State University, Russia, 1999 Adviser: E.Kramarenko