Detecting Friedel oscillations in ultracold Fermi gases
| Autor: | Niclas Luick, Keno Riechers, Klaus Hueck, Thomas Lompe, Henning Moritz |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Friedel oscillations Condensed Matter::Quantum Gases business.industry Shot noise FOS: Physical sciences 01 natural sciences Signal Atomic and Molecular Physics and Optics 010305 fluids & plasmas Amplitude Quantum Gases (cond-mat.quant-gas) 0103 physical sciences Rectangular potential barrier Atomic physics Photonics 010306 general physics Fermi gas business Condensed Matter - Quantum Gases Fermi Gamma-ray Space Telescope |
| DOI: | 10.48550/arxiv.1704.06626 |
| Popis: | Investigating Friedel oscillations in ultracold gases would complement the studies performed on solid state samples with scanning-tunneling microscopes. In atomic quantum gases interactions and external potentials can be tuned freely and the inherently slower dynamics allow to access non-equilibrium dynamics following a potential or interaction quench. Here, we examine how Friedel oscillations can be observed in current ultracold gas experiments under realistic conditions. To this aim we numerically calculate the amplitude of the Friedel oscillations which a potential barrier provokes in a 1D Fermi gas and compare it to the expected atomic and photonic shot noise in a density measurement. We find that to detect Friedel oscillations the signal from several thousand one-dimensional systems has to be averaged. However, as up to 100 parallel one-dimensional systems can be prepared in a single run with present experiments, averaging over about 100 images is sufficient. Comment: 5 pages, 4 figures |
| Databáze: | OpenAIRE |
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