Forces from fluctuations in and out of equilibrium
(in QED and active matter)
Summary
I. Force from equilibrium fluctuations: Particles, radiation, Casimir force
II. Force from "active matter": Pressure, ratchets, and curving boundaries
III. Ratchet forces: Destruction of order, thermal non-equilibrium
IV. Near-field effects: Rytov formalism, hear transfer and force
V. Engine: Work, friction, efficiency 
VI. Dynamic Casimir phenomena: Friction, and anomalous dispersion at zero temperature 
(BBT)
Acknowledgments
Engine
David Gelbwaser, Noah Graham, Matthias Krüger
Casimir phenomena
S.J. Rahi, M. Maghrebi, V. Golyk, R. Golestanian, G. Bimonte, T. Emig, R.L. Jaffe
Active matter
A. Solon, Y. Ben Dor, S. Ro, N. Nikola, R. Voituriez, Y. Fily, A. Baskaran, M.E. Cates, J. Tailleur, Y. Kafri
Cambridge University Quantum Colloquium 8 November 2023