<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Emergent phenomena in two-dimensional Fermi systems"^^ . "In this thesis, I present the experimental exploration of emergent effects in a twodimensional gas of ultracold atoms. First, I describe a novel method to measure the momentum distribution of a strongly interacting gas. Using this technique, we map out the phase diagram of the 2D BEC-BCS crossover and measure the critical temperature for superfluidity. We observe, for the first time, the Berezinskii–Kosterlitz–Thouless phase transition in a Fermi gas that is characterized by algebraic decay of phase correlations. In a second experiment, we investigate fermion pairing in the normal phase using radio-frequency spectroscopy. We observe a crossover from two-body to many-body pairing at remarkably high temperatures, thus answering\r\na long-standing question concerning the existence of a pseudogap in this system. In the next experiment, we address the question of scale-invariance breaking, also known as a quantum anomaly, in the dynamics of a 2D Fermi superfluid. We observe a striking manifestation of this quantum anomaly in the momentum-space dynamics of the system, which demonstrates that short-range fermionic interactions have a\r\nstrong influence on long-range coherence in the system. By revealing the intriguing effects emerging from the interplay between fermionic statistics, strong interactions and reduced dimensionality, this thesis advances our general understanding of many-body quantum systems."^^ . "2018" . . . . . . . "Puneet"^^ . "Anantha Murthy"^^ . "Puneet Anantha Murthy"^^ . . . . . . "Emergent phenomena in two-dimensional Fermi systems (PDF)"^^ . . . "PMThesis_FINAL_PRINT.pdf"^^ . . . "Emergent phenomena in two-dimensional Fermi systems (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Emergent phenomena in two-dimensional Fermi systems (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Emergent phenomena in two-dimensional Fermi systems (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Emergent phenomena in two-dimensional Fermi systems (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Emergent phenomena in two-dimensional Fermi systems (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #24730 \n\nEmergent phenomena in two-dimensional Fermi systems\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .