initiated by Paul Ehrenfest in 1912
currently organized by Ana Achúcarro & Luca Giomi (read about its history)

Dinner participants: 79 | Follow the live stream


Markus Aspelmeyer

University of Vienna

March 29

7:30 p.m.


How does a quantum object gravitate?

No experiment today provides evidence that gravity requires a quantum description. The growing ability to achieve quantum optical control over massive solid-state objects may change that situation – by enabling experiments that directly probe the phenomenology of quantum states of gravitational source masses. I will review the current status in the lab and the challenges to be overcome for future experiments.

The Colloquium Ehrenfestii takes place Wednesday evenings starting at 19:30 hours in the main auditorium of the Oort building. Before the Colloquium, there is a common dinner in the canteen located on the ground floor of the Oort building. This dinner starts at 18:00 hours sharp and is free of charge, under the condition that one attends the colloquium and that one has made a reservation before noon on the Tuesday preceding the colloquium.

Meal registrations may close earlier, when 80 persons have signed up.

Colloquium Ehrenfestii Program 2023

29 Mar

Markus Aspelmeyer (University of Vienna)

How does a quantum object gravitate?

14 Jun

Heinrich Jaeger (University of Chicago)


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