Leonhard Neuhaus

Leonhard Neuhaus
Early Stage Researcher
Université Pierre et Marie Curie

Academic background

I hold a diploma of physics degree (equivalent to a M.S.) from the Ludwig-Maximilians-University of Munich, Germany.

A. G. Kuhn et al., Appl. Phys. Lett. 104, 044102 (2014)


Current research topic

My current research aims at preparing and characterizing non-classical states of motion of a mechanical oscillator. Today’s main obstacle to observing genuine quantum behavior of a massive mechanical oscillator is thermal noise, which usually leads to the rapid decoherence of pure quantum states. By choosing a crystalline material such as quartz for the oscillator, its thermal noise can be drastically decreased in a low-temperature environment without further drawbacks. Coupling such a cryogenic mechanical oscillator to an optical cavity, the mechanical oscillator’s thermal occupancy can subsequently be lowered down to the level of few quanta by laser-cooling. Once this regime is reached, it will be possible to prepare non-classical states of mechanical motion and to perform proof-of-principle demonstrations of techniques for gravitational wave interferometers or to test macroscopic quantum mechanics with this system. The enormous level of sensitivity reached in these experiments may also be of interest for sensing applications.