Past Event

Physics Colloquium: "Levitodynamics: Quantum control of a levitated nanoparticle" with Lukas Novotny

October 16, 2023
12:30 PM - 1:30 PM
Event time is displayed in your time zone.
Center for Theoretical Physics (Pupin Hall 8th Floor)

"Levitodynamics: quantum control of a levitated nanoparticle"

Optical fields exert both conservative and non-conservative forces on polarizable ob-
jects. These forces can be used to control and manipulate the motion of atoms, molecules
or nanoparticles. In this presentation I discuss our experiments with optically levitated
nanoparticles in ultrahigh vacuum. Using feedback control we cool the particle’s center-of-
mass motion to its quantum ground state and observe quantum signatures in the spectrum
of the scattered light. Our goal is to generate macroscopic quantum superpositions by plac-
ing the particle into two locations at once. This will allow us to test quantum collapse
models and the interface of quantum mechanics and gravity.