Superfluidity in a gas of strongly interacting fermions
Name
LT25_ketterle.pdf
Size
429.64 KB
Format
Adobe PDF
Checksum (MD5)
b0f80f40dfd7184b01819157e81b65ed
Author(s)
Schunk, C. H.
Shin, Y.
Schirotzek, Andre
Ketterle, Wolfgang
Date Issued
March 2009
Journal
Journal of Physics: Condensed Matter
Publisher
Institute of Physics Publishing
Citation
Ketterle, W. et al. “Superfluidity in a gas of strongly interacting fermions.” Journal of Physics: Condensed Matter 21.16 (2009): 164206.
Version
Author's final manuscript
Abstract
After an introduction into 100 years of research on superfluidity and the concept of the BCS–BEC crossover, we describe recent experimental studies of a spin-polarized Fermi gas with strong interactions. Tomographically resolving the spatial structure of an inhomogeneous trapped sample, we have mapped out the superfluid phases in the parameter space of temperature, spin polarization, and interaction strength. Phase separation between the superfluid and the normal component occurs at low temperatures, showing spatial discontinuities in the spin polarization. The critical polarization of the normal gas increases with stronger coupling. Beyond a critical interaction strength all minority atoms pair with majority atoms, and the system can be effectively described as a boson–fermion mixture. Pairing correlations have been studied by rf spectroscopy, determining the fermion pair size and the pairing gap energy in a resonantly interacting superfluid.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1088/0953-8984/21/16/164206
