Large phonon time-of-flight fluctuations in expanding flat condensates of cold fermi gases

2017/10/15 by Da-Shin Lee, Lee, Da-Shin, Chi-Yong Lin +4
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Gases (cond-mat.quant-gas) #Quantum, superfluid, helium dynamics #cond-mat.quant-gas

paper · pdf · doi:10.48550/arxiv.1710.05466

In this version v4 (9 pages, 1 figures), we have modified slightly the introduction, the results are unchanged

openalex publication_date 2017/10/15 · arxiv created 2020/05/11 · arxiv updated 2020/05/12 · openalex created_date 2022/10/07 · openalex updated_date 2026/07/28

Abstract

We reexamine how quantum density fluctuations in condensates of ultra-cold fermi gases lead to fluctuations in phonon times-of-flight, an effect that increases as density is reduced. We suggest that these effects should be measurable in pancake-like (two-dimensional) condensates on their release from their confining optical traps, providing their initial (width/thickness) aspect ratio is suitably large.

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