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

TL;DR

This paper investigates how quantum density fluctuations cause measurable phonon time-of-flight variations in expanding two-dimensional cold Fermi gas condensates, especially when the initial aspect ratio is large.

Contribution

It proposes that phonon time-of-flight fluctuations due to quantum effects are observable in pancake-like condensates upon release from traps, highlighting a new measurable quantum phenomenon.

Findings

Fluctuations increase as density decreases

Effects are measurable in 2D condensates upon expansion

Initial aspect ratio influences fluctuation magnitude

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.