Scientific Activities
Seminars
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Seminar of International Centre of Physics: | |
| Title | Bosonization of Fermi surface: the method of coadjoint orbits |
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| Speaker | Prof. Dam Thanh Son |
| Affiliation | University of Chicago, USA |
| Date | Friday, 31-07-2026 |
| Time | 10:00 AM |
| Location | Room 315, 10 Dao Tan, Giang Voi, Ha Noi |
| Abstract | Fermi liquid theory is a cornerstone of condensed matter physics. The theory of Fermi liquid, constructed by Landau in 1958, is formulated in terms of a kinetic equation rather than an action principle. We describe a new method that leads to a field-theoretical reformulation of Landau Fermi liquid theory. In this approach, the low-energy states of a Fermi liquid is a coadjoint orbit of the group of canonical transformations. The Berry phase that the Fermi surface acquires while changing its shape is related to the Kirillov-Kostant-Souriau symplectic form. We show that the resulting local effective field theory captures both linear and nonlinear effects in Landau’s Fermi liquid theory. Possible extensions and applications of the theory are described. |
| Host person | Đinh Văn Trung |