"Theory of Particle Physics and Cosmology" Seminar
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2026-04-09 (Thursday)
room 1.01, Pasteura 5 at 12:15 
Piotr Chankowski (IFT UW)Effective quantum field theory approach to the ferromagnetic phase transition in a gas of fermions
I will summarize our recent effective quantum field theory computations of the free energy of a gas of spin-1/2 fermions interacting through a short-range spin-independent repulsive potential. The result is used to study the impact that higher-order corrections can have on the characteristics of a phase transition to the ordered phase, namely on the emergence of itinerant ferromagnetism. I will also comment on the relation of our computations to experimental searches for the ferromagnetic transition in cold gases of fermionic atoms.