The unitary Fermi gas
by Drut, Joaquin E., Ph.D., UNIVERSITY OF WASHINGTON, 2008, 139 pages; 3303283

Abstract:

This dissertation is concerned with the physics of dilute Fermi gases in a regime of short-range attractive interactions and large scattering lengths. This work represents the first non-perturbative determination of the thermal properties of these gases at and around the so-called unitary regime (infinite scattering length). The behavior of these gases is universal: they describe systems of cold atoms as well as dilute neutron matter. The properties computed here include energy, entropy, chemical potential, condensate fraction, critical temperature for superfluidity and quasiparticle spectrum. The calculation of some of these properties for atomic gases in traps is also presented and compared with experimental data, with which remarkable agreement is found. In addition, the results are presented here of a next-to-next-to-leading order ε expansion calculation of the ground state energy per particle of a unitary Fermi gas.

 
AdvisersAurel Bulgac; Dam Thanh Son
SchoolUNIVERSITY OF WASHINGTON
SourceDAI/B 69-02, p. , Jun 2008
Source TypeDissertation
SubjectsNuclear Physics; Condensed matter physics
Publication Number3303283
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