Research
“How does a quantum object gravitate?” - “How far can we push massive objects into the quantum regime?” - “How well can we measure gravity of microscopic systems?” - “Can space-time be prepared in a quantum superposition?”
Such questions and their implications for the foundations of physics are the driving force behind our research. To address them we are developing quantum measurement and control techniques to investigate and utilize quantum states of motion of massive solid state objects. We are also developing inertial precision sensing techniques to measure gravitational fields at the smallest possible scales of mass and distance. Our research aims to provide new insights on macroscopic quantum physics, on gravity at small scales and, in the long run, on the phenomenology of the gravity-quantum interface in table-top experiments.
Our Research Fields
-
Quantum Control of Massive Solids
In our quantum experiments we aim to achieve control over quantum states of motion of increasingly massive solid-state objects – from dielectrics to superconductors. One main question is how to prepare extreme delocalization or quantum superpositions of such objects. We use methods from quantum optomechanics applied to solids trapped in ultra-high vacuum, in combination with real-time potential control to modify the wave-packet dynamics through evolution in nonlinear potentials.
Aspelmeyer Group, University of Vienna -
Precision Measurements of Gravity
In our gravity experiments we aim to push current limits on measuring gravity at microscopic scales. Our current experiments involve smallest possible source masses at shortest possible distances. One main question is: how well can we isolate gravity as a coupling mechanism against non-gravitational effects in future small-scale quantum experiments? To minimize environmental influences, we are now operating one experiment in an underground laboratory facility close to Vienna (Conrad Observatory).
Aspelmeyer Group, University of Vienna -
Gravitational Quantum Physics
Our long-term goal is to realize and study quantum sources of gravity in the lab. In collaboration with colleagues from theory we try to formulate meaningful questions that help to establish decisive experimental tests of the quantum nature of gravity.
Aspelmeyer Group, University of Vienna