Physics (Internal)

Summer Student Seminar

This event is part of the Graduate Student Council Events.

Mohit Pandey (CMT/BIO):

Understanding perfect adaptation in bacteria through integral feedback control Despite living in a noisy environment, bacteria E.Coli show robust macroscopic response to chemical stimulus. More specifically, a chemical concentration gradient induces a rapid change in the bacteria's tumbling frequency, which then gradually adapts back precisely to its pre-stimulus value. In an attempt to understand this phenomenon, we would talk about integral feedback control.

Kristine Rezai (AMO/CME):

Slow spin dynamics in a 2D dipolar spin ensemble on the surface of diamond Statistical mechanics has long been the framework which connects the microscopic world to macroscopic observables. However, its fundamental assumption has been shown to break down in a class of strongly disordered systems, resulting in a slowdown or absence of thermalization. In this work, we use a shallow nitrogen-vacancy center to probe the dynamics of disordered dipolar interacting electronic spin-1/2 defects on the diamond surface. Using magnetic resonance techniques, we characterize and control the strength of disorder and dipolar interactions among the electronic spins. We measure the autocorrelation of individual spin projection, which exhibits a decay on a time scale much slower than the inverse interaction strength, indicating a substantial slowdown of thermalization.

Pizza will be served during the event.