Theory of BCS-BEC crossover in ultra-cold atomic gases

Title: Theory of BCS-BEC crossover in ultra-cold atomic gases
Identifier: d_2009_2013:75ee9ea07776:11597
identifier: 11999
Creator: Gurcan, Yasemin,
Contributor: Sultan Catto
Date: 2012
Language: English
Publisher: City University of New York.
Subject: Atomic physics | Condensed matter physics | Low temperature physics | BCS | BEC | CROSSOVER
Abstract: In ultracold atomic fermions, the sign and the magnitude of pairing interactions can be controlled by using the magnetically-tuned Feshbach resonances to achieve a continuos transition between Cooper pairs of dilute fermi gas to BEC of diatomic molecules, which is known as the "BCS-BEC crossover". At present, although several models have been proposed, there is still no exact analytical solution of the many-body problem of BCS-BEC crossover region. The standard BCS mean field theory of superconductivity was used [1-3] to describe the whole crossover resulting a useful approximation. In our studies, we investigated solvable models for the best variational analytical solution for BCS-BEC crossover at T= 0.
Type: dissertation
Source: 2009_2013.csv
degree: Ph.D.
Program: Physics