Date: Monday, November 27, 2017
Location: 1866 East Hall (4:00 PM to 5:00 PM)
Title: Transition between ferromagnetic and paramagnetic regimes for spherical spin glass model
Abstract: We consider a spherical spin system with pure 2spin spherical SherringtonKirkpatrick (SSK) Hamiltonian with ferromagnetic CurieWeiss interaction. This model shows a twodimensional phase transition with respect to the temperature and the coupling strength. Using the results of random matrix theory and steepest descent method, we investigate the fluctuation of free energy when the temperature is scaled with the system size and approaches the critical line between paramagnetic and ferromagnetic regimes. In the talk, I will first briefly present the history and known results of spinglass. Then the phase diagram of the SSK model with ferromagnetic interaction will be discussed. If time permits, we will discuss invoked questions such as the independence of fluctuations of linear statistics and leading eigenvalues of rank 1 spiked random matrices.
Files:
Speaker: Hao Wu
Institution: University of Michigan
Event Organizer: Thomas Bothner and Guilherme Silva bothner@umich.edu, silvag@umich.edu
