Dynamic Structure Factor in BCC Helium from Quantum Monte Carlo
ORAL
Abstract
An unexpected optic-like mode has been observed by inelastic neutron scattering in BCC Helium-4. We report on worm algorithm quantum Monte Carlo calculations of the dynamic structure factor in order to compare with experiment. A theoretical model based on a dynamical Landau-Ginzburg action is also analyzed.
*Israel Science Foundation, US-Israel Binational Science Foundation
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