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Showing 1 to 9 of 9 for “"Interacting Fermi gas"”.
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Thermodynamics and solitonic excitations of a strongly-interacting Fermi gas
… and solitonic excitations of a strongly-interacting Fermi gas, realized with 6Li atoms at a Feshbach resonance where the scattering length is large. The strongly-interacting Fermi gas, also called the unitary Fermi gas, exhibits a novel superfluidity that is a crossover of the …
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Quasi-particle Breakdown and Heat Transport in a Homogeneous Strongly-interacting Fermi Gas
… describes experiments on a homogeneous strongly-interacting Fermi gas, consisting of a spin mixture of ⁶Li atoms with interactions induced by a Feshbach resonance. The tunability and universality of this atomic gas make it an ideal platform to study many-body physics of interacting Fermi systems. …
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The existence of singular terms and their effects on the validity of Fermi liquid theory in two dimensions
The question of the breakdown of Fermi liquid theory in two dimensions is examined in the context of perturbation theory for a dilute interacting Fermi gas. The quasiparticle interaction function, fic;u;, is calculated for such a system. The interaction function, calculated to second order in terms …
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Quantum transport in strongly interacting, ultracold fermi gases in box potentials
Transport of strongly interacting fermions is crucial for systems as varied as high-𝑇 subscript 𝑐 superconductors, twisted bi-layer graphene, nuclear fission, and neutron stars. In this thesis, I will describe the experiments we performed to measure the transport properties of a …
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Ultracold Fermi gas with repulsive interactions
… results from experiments of ultracold atomic Fermi gases with repulsive interaction. Itinerant ferromagnetism was studied by simulating the Stoner model with a strongly interacting Fermi gas of ultracold atoms. We observed nonmonotonic behavior of lifetime, kinetic energy, and size for …
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Quantum coherence and magnetism in bosonic and fermionic gases of ultracold atoms
… two sets of experimental studies in bosonic and fermionic gases are described. In the first part of the thesis, itinerant ferromagnetism was studied in a strongly interacting Fermi gas of ultracold atoms. The observation of nonmonotonic behavior of lifetime, kinetic energy, and size for …
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Counting degrees of freedom in quantum field theory using entanglement entropy
… in 1/N, while mapping the matrix model to a non-interacting Fermi gas enables us to determine the result to all orders in 1/N. We match the leading piece with N3/ 2 scaling - a strong coupling phenomenon in the field theory - with the holographic duals of these theories. Establishing a measure …
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Thermodynamic and hydrodynamic behaviour of interacting Fermi gases
Fermionic matter is ubiquitous in nature, from the electrons in metals and semiconductors or the neutrons in the inner crust of neutron stars, to gases of fermionic atoms, like 40K or 6Li that can be created and studied under laboratory conditions. It is especially interesting to study these …