Radio-frequency spectroscopy of ultracold atomic Fermi gases
Name
827269641-MIT.pdf
Description
Full printable version
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27.92 MB
Format
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Author(s)
Schirotzek, Andre
Advisor(s)
Wolfgang Ketterle and Martin W. Zwierlein.
Alternative Title
Radiofrequency spectroscopy of strongly interacting Fermions
Date Issued
2010
Publisher
Massachusetts Institute of Technology
Abstract
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).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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