Oct 20 – 25, 2019
Europe/Zurich timezone

qBOUNCE: first results of the Ramsey-type GRS experiment

Oct 22, 2019, 5:55 PM
WHGA/001 - Auditorium (PSI)

WHGA/001 - Auditorium



Joachim Bosina (Atominstitut TU Wien)


This talk focuses on the control and understanding of a gravitationally interacting elementary quantum system using gravity resonance spectroscopy (GRS) with ultracold neutrons (UCN). This technique offers a new way of looking at gravitation at short distances based on quantum interference.
In the past years, the qBOUNCE collaboration has designed and built a new Ramsey-type GRS experiment at the Institute Laue-Langevin (Grenoble), which increases the achievable sensitivity by more than an order of magnitude with respect to previous implementations. In 2018 we were able to demonstrate gravitational state transitions. The new Ramsey-type implementation is not only sensitive to a range of hypothetical variations of Newton's potential at the microscale, but it can also be used to test the electric charge neutrality of the neutron. We present the results of first charge measurements performed in 2018 and give an outlook on further developments.

Primary author

Joachim Bosina (Atominstitut TU Wien)


Andrey N. Ivanov (Atominstitut TU Wien) Gunther Cronenberg (Atominstitut, Vienna University of Technology) Hanno Filter (Atominstitut TU Wien) Hartmut Abele (Atominstitut) Jakob Micko (Institut Laue-Langevin) Mario Pitschmann (Atominstitut TU Wien) Martin Thalhammer (Atominstitut TU-Wien) Peter Geltenbort (Institut Laue-Langevin) René I.P. Sedmik (Atominstitut TU Wien) Tobias JENKE (Institut Laue-Langevin) Tobias Rechberger (Atominstitut, TU Wien)

Presentation materials