Tue February 14, 2023 4:00 pm
CUA Seminar – Gabriele Ferrari: Ferromagnetism in an extended coherently-coupled atomic superfluid
Location:MIT 4-270
Gabriele Ferrari, University of Trento
Ten Minute Talk:"Spin dynamics dominated by resonant tunneling into molecular states" by
Eunice Lee
Extended atomic superfluids in the presence of a coherent coupling between two internal states represent a flexible platform to address open problems in condensed matter and fundamental physics. I will discuss their application to the experimental observation of a quantum phase transition from a para- to a ferromagnetic state. The nature of the transition is assessed by looking at the phase diagram as a function of the control parameters, at hysteresis phenomena, and at the magnetic susceptibility and the magnetization fluctuations around the critical point. Domain walls separating regions of opposite magnetization in the ferromagnetic state are created deterministically. I will also discuss the local decay of the metastable state into the real ground state leading to the probabilistic nucleation of bubbles.