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A: Fachverband Atomphysik
A 9: Ultra-cold atoms, ions and BEC (with Q)
A 9.51: Poster
Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof
Motion of a rotating impurity in a Bose-Einstein condensate — •Bikashkali Midya1, Richard Schmidt2, and Mikhail Lemeshko1 — 1Institute of Science and Technology (IST) Austria, Am Campus 1, 3400 Klosterneuburg, Austria — 2ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
In this work, we consider the translational motion of a rotating quantum impurity coupled to a Bose-Einstein condensate with boson-boson contact interaction, and boson-impurity anisotropic interaction. The microscopic Hamiltonian to describe such system is derived by first eliminating the dynamical variable of impurity by Lee-Low-Pines transformation, and then approximating the boson system by Bogoliubov method. The effect of the linear momentum of the impurity on the quasiparticle “angulon", a quantum rotor dressed by quantum field [1], spectrum is investigated by the variational technique.
[1] Richard Schimdt and Mikhail Lemeshko, "Rotation of quantum impurities in the presence of a many-body environment", Phys. Rev. Lett. 114, 203001 (2015).