Radio-frequency spectroscopy of ultracold atomic Fermi gases
Author(s)
Schirotzek, Andre![Thumbnail](/bitstream/handle/1721.1/77482/827269641-MIT.pdf.jpg?sequence=5&isAllowed=y)
DownloadFull printable version (27.92Mb)
Alternative title
Radiofrequency spectroscopy of strongly interacting Fermions
Other Contributors
Massachusetts Institute of Technology. Dept. of Physics.
Advisor
Wolfgang Ketterle and Martin W. Zwierlein.
Terms of use
Metadata
Show full item recordAbstract
This thesis presents experiments investigating the phase diagram of ultracold atomic Fermi gases using radio-frequency spectroscopy. The tunability of many experimental parameters including the temperature, the interparticle interaction strength and the relative population of different Fermions allows to access very different physical regimes. Radio-frequency spectroscopy has been developed into an ideal tool to probe correlations between particles in these different phases. In particular, radio-frequency spectroscopy of highly population imbalanced atomic Fermi systems gives access to the impurity problem: A single Fermion, or Boson, immersed in a sea of Fermions constitutes a polaron, which can be described by Landau's Fermi liquid theory. A critical interaction strength can be identified separating the regime of a fermionic polaron and a bosonic polaron. Radio-frequency spectroscopy of the polarized superfluid phase allows an accurate measure of the superfluid gap [Delta] and allows to identify the importance of Hartree Mean-field energies. Furthermore, it is shown how these different physical regimes are connected.
Description
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2010. Cataloged from PDF version of thesis. Includes bibliographical references (p. 143-154).
Date issued
2010Department
Massachusetts Institute of Technology. Department of PhysicsPublisher
Massachusetts Institute of Technology
Keywords
Physics.