Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 22: Other Low Temperature Topics: Poster Session

TT 22.1: Poster

Montag, 16. März 2015, 15:00–18:00, Poster B

Quantum Monte Carlo Results for the Breathing Mode of Trapped Bosons — •Tobias Dornheim, Alexei Filinov, and Michael Bonitz — Institut für Theoretische Physik und Astrophysik der Christian-Albrechts-Universität zu Kiel, Leibnizstraße 15, 24098 Kiel, Germany

The quantum breathing mode (QBM, e.g. [1]) is of fundamental interest for the investigation of harmonically confined systems since it might serve as a tool of diagnostics [2]. We perform ab initio path integral Monte Carlo (PIMC) [3] simulations for up to N=1000 particles in TD equilibrium and investigate the QBM for both dipole- and Coulomb-interacting bosons using a recently developed improved sum-rule formalism [4]. We study the dependence on the particle number N and coupling strength λ for 2D and 3D systems and observe a transition towards the classical limit with increasing system size and interaction.

[1] J. W. Abraham and M. Bonitz, Contrib. Plasma Phys. 54, 27-99 (2014)

[2] C. R. McDonald et al., Phys. Rev. Lett. 111, 256801 (2013)

[3] M. Boninsegni et al., Phys. Rev. E 74, 036701 (2006)

[4] J. W. Abraham et al., New J. Phys. 16, 013001 (2014)