Universal sound diffusion in a strongly interacting Fermi gas
Abstract
A gas of strongly interacting fermionic atoms can serve as a model for systems with densities and energies spanning many orders of magnitude. This universality of physics comes about thanks to a property known as scale invariance. Patel et al. exploited this concept to draw universal conclusions about the attenuation of sound in such systems by studying a homogeneous gas of lithium-6 atoms at very low temperatures (see the Perspective by Schaefer). They found that below the superfluid transition, the sound diffusivity behaved not unlike what has been observed in helium-4, a fluid of strongly interacting bosons.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 04, 2020
- Source ID
- 10.1126/science.aaz5756
Entities
People
- Biswaroop Mukherjee
- Julian Struck
- Martin W. Zwierlein
- Parth B Patel
- Richard J Fletcher
- Zhenjie Yan
Organizations
- Air Force Office of Scientific Research
- David and Lucile Packard Foundation
- Labex (Sweden)
- MIT-Harvard Center for Ultracold Atoms
- Massachusetts Institute of Technology
- National Science Foundation
- Office of Naval Research
- École Normale Supérieure