Ludwig-Maximilians University              32nd Arnold-Sommerfeld-Lectures                                January 13, 2026

The force of nothing:       

Attraction and Repulsion in the Quantum Void
  La Voix des airs   The Castle


Summary

I.      Casimir force:               EM wave  Heisenberg Uncertainty vaccuum fluctuations

                                            Casimir Blobs         Water wave

yellow ball High precision experimental confirmation with scanning probes:      

yellow ball MEM device applications require control of this force (stiction)                         

II.     Repulsion?

yellow ball Metamaterials, als invisibility cloaks:      The Pilgrim

yellow ball Geometry: 

III.   Earnshaw's theorem:       The Castle      

 red ball No levitation is possible with electrostatic interactions:  

red ball No levitation is possible with Casimir forces with dielectric composites: 

IV.  Heat radiation:

yellow ball Classical radiation pressure:                                 Hieronymus-Bosch,-The-Last-Judgement.-Central-Panel-with-Detail-of-Heaven

     yellow ball Non-classical (near field) counterpart                      

V.   Propulsive force:

     yellow ball Contactless heat engine:                          

VI.    Friction of vacuum::                leftarrow


Acknowledgments

Thosten Emig, Matthias Krüger, Noah Graham, Robert Jaffe

Jamal Rahi, Mohammad Maghrebi, Vlad Golyk, David Gelbwaser, Dhruv Shah

M. Hertzberg, A. Scardicchio, A. Rodriguez, S. Johnson, U. Mohideen, R. Zandi