+++ONLINE KOLLOQUIUM+++ Levitodynamics (Prof. Lukas Novotny)

Date: Jun 2, 2020
Time: 02:30 PM (Local Time Germany)
Speaker: Prof. Lukas Novotny
ETH Zürich, Switzerland
Location: +++ONLINE KOLLOQUIUM+++

I discuss our experiments with optically levitated nanoparticles in ultrahigh vacuum. Using both active and passive feedback techniques we cool the particle’s center-of-mass temperature below T 100μK and reach mean quantum occupation numbers of n = 4.

I show that mechanical quality factors of Q > 109 can be reached and that damping is dominated by photon recoil heating. The vacuum-trapped nanoparticle forms an ideal model system for studying non-equilibrium processes, nonlinear interactions, and ultrasmall forces.

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