Discrete Scale Invariance in Ultracold Atoms

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Date/Time:Monday, 06 Apr 2009 from 4:10 pm to 5:10 pm
Location:Physics, Room 3
Phone:515-294-5440
Channel:Colloquium
Categories:Lectures
Actions:Download iCal/vCal | Email Reminder
Eric Braaten (The Ohio State University)

In 1970, a Russian physicist named Efimov predicted that a 3-body system consisting of identical bosons with strong short-ranged interactions would display remarkable universal properties at sufficiently low energy. These universal properties are characterized by a discrete scaling symmetry: invariance under changing lengths by a power of 22.7. Thirty-five years went by without any experimental evidence for this phenomenon. However recent experiments with trapped atoms cooled to ultralow temperatures are finally beginning to provide evidence for Efimov physics.