The LQP colloquium aims at communicating and promoting outstanding research in the context of local quantum physics, within the LQP community and beyond. The colloquium is held as a webinar and is intended to take place bi-annually.

The next event takes place March 8, 2023, 5pm CET (4pm UTC):

Jürg Fröhlich (ETH Zürich): Quantum Mechanics as a Complete Theory

Abstract: I present a proposal of how to complete Quantum Mechanics (QM) to a theory that actually makes sense. The proposal is called ETH - Approach to QM; “E ” standing for Events, “T ” for Trees, and “H ” for Histories. This approach supplies the last one of three pillars QM can be constructed upon, which are:

   (i) physical quantities characteristic of a system are represented by selfadjoint operators. Their time evolution is given by the Heisenberg equations;

  (ii) introduce meaningful notions of states and of potential and actual events;

(iii) find a general Law for the non-linear stochastic time evolution of states of individual systems.

After explaining some general ideas underlying the ETH-Approach I discuss an application to the quantum theory of fluorescence of an atom coupled to the radiation field. My general goal is to help removing some of the enormous confusion befuddling many people who claim to work on the foundations of QM.

Login details for the talk will be distributed via newsletter (follow the link to subscribe).

Past events are available on our youtube channel.

Past events in the series:

  • March 16, 2022: Feng Xu (UC Riverside): Rigorous results about entropy in QFT
  • November 24, 2021: Hirosi Ooguri​ (Caltech & Kavli IPMU): Symmetry in QFT and Gravity​
  • March 17, 2021: Horacio Casini (Bariloche Atomic Centre): Entanglement entropy and the renormalization group flow
  • Sep 16, 2020: Klaus Fredenhagen (U Hamburg): Local covariance and dynamics in algebraic quantum field theory


  • S. Hollands (U. Leipzig & MPI-MiS)
  • Y. Kawahigashi (U. Tokyo)
  • G. Lechner (FAU Erlangen)
  • R. Longo (Roma II)
  • K.-H. Rehren (U. Göttingen)

Contact: J. Zahn (U. Leipzig)