Dynamics of a Fermi Gas Quenched to Unitarity
| Autor: | Paul Dyke, Sascha Hoinka, Carlos C. N. Kuhn, Chris J. Vale, A. Hogan, Ivan Herrera |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Condensed matter physics Unitarity Condensation General Physics and Astronomy FOS: Physical sciences Fermion 01 natural sciences 7. Clean energy Measure (mathematics) 010305 fluids & plasmas Momentum Superfluidity Quantum Gases (cond-mat.quant-gas) Phase (matter) 0103 physical sciences 010306 general physics Fermi gas Condensed Matter - Quantum Gases |
| Zdroj: | Physical review letters. 127(10) |
| ISSN: | 1079-7114 |
| Popis: | We present an experimental study of a two component Fermi gas following an interaction quench into the superfluid phase. Starting with a weakly attractive gas in the normal phase, interactions are ramped to unitarity at a range of rates and we measure the subsequent dynamics as the gas approaches equilibrium. Both the formation and condensation of fermion pairs are mapped via measurements of the pair momentum distribution and can take place on very different timescales, depending on the adiabaticity of the quench. The contact parameter is seen to respond very quickly to changes in the interaction strength, indicating that short-range correlations, based on the occupation of high-momentum modes, evolve far more rapidly than the correlations in low-momentum modes necessary for pair condensation. Comment: 6 pages, 3 figures |
| Databáze: | OpenAIRE |
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