Cornell University

Department of Physics Colloquium

Monday, January 30, 2023 at 4:00pm to 5:00pm

Rockefeller Hall, Schwartz Auditorium
Central Campus

General Physics Colloquium, Prof. Vincenzo Vitelli, University of Chicago

Title:  Non-reciprocal Phase Transitions

Host:  Itai Cohen

Abstract:  The interaction between a peregrine falcon and a dove is visibly non-reciprocal. What happens to the well established framework of phase transitions in non-reciprocal systems far from equilibrium? In this talk, I will answer this question by looking at three archetypal classes of self-organization out of equilibrium: synchronization, flocking and pattern formation. Simple demonstrations with robots will be presented along with naturally occurring phenomena from various domains of science that share a common feature: reciprocity has no reason to exist. In all these cases, the emergence of unique time-dependent many-body phases can be captured by combining insights from non-Hermitian quantum mechanics and bifurcation theory. This approach is a step towards a general theory of critical phenomena in systems whose dynamics is not governed by an optimization principle.

Google Calendar iCal Outlook
Event Type



LASSP, Applied and Engineering Physics, Physics, LEPP, CLASSE

University Themes



cascal, physics



Contact E-Mail

Contact Name

Sue Sullivan

Contact Phone



Prof. Vincenzo Vitelli

Speaker Affiliation

University of Chicago

Dept. Web Site

Recent Activity