Events - Weekly
May 2013 >>
|Sunday, May 5|
|Monday, May 6|
|Tuesday, May 7|
Math Physics Seminar, Alessandro Giuliani, University of Rome, Striped states at the ferromagnetic transition
We consider a two-dimensional Ising model with nearest neighbor ferromagnetic and long-range, power-law decaying, antiferromagnetic interactions. We assume that the decay exponent of the antiferromagnetic part is larger than 4. The ground state displays a transition as the strength of the ferromagnetic interaction J is increased: if J is smaller than a critical value J_c, then the ground state is non-uniform, while it becomes uniform for all J>J_c. The transition to the uniform state is believed to take place in a ``universal" manner, via a sequence of transitions among periodic striped states. In this talk we report recent rigorous results confirming this picture: namely, the ratio of the ground state energy to the one of the optimal periodic striped state tends to 1 as J-->J_c^-. The proof is based on a combination of localization bounds into mesoscopic boxes and reflection positivity. Joint work with E. Lieb and R. Seiringer.
Jadwin A06 · 4:30 p.m.– 6:00 p.m.
|Wednesday, May 8|
|Thursday, May 9|
|Friday, May 10|
High Energy Theory Seminar - IAS - Thomas Faulkner, IAS - The Entanglement Renyi Entropies of Disjoint Intervals in AdS/CFT
I will discuss how to compute Entanglement Renyi Entropies for two dimensional holographic CFTs using AdS_3 handlebody solutions. Some simplifying assumptions are made. The answer I find is consistent with the Ryu-Takayanagi prediction for Entanglement Entropy.
Bloomberg Lecture Hall - Institute for Advanced Study · 1:30 p.m.– 2:30 p.m.
|Saturday, May 11|