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Quantum Bose-Fermi droplets

by Debraj Rakshit, Tomasz Karpiuk, Mirosław Brewczyk, Mariusz Gajda

This Submission thread is now published as SciPost Phys. 6, 079 (2019)

Submission summary

As Contributors: Miroslaw Brewczyk · Mariusz Gajda · Tomasz Karpiuk · Debraj Rakshit
Arxiv Link: (pdf)
Date accepted: 2019-06-20
Date submitted: 2019-05-30 02:00
Submitted by: Brewczyk, Miroslaw
Submitted to: SciPost Physics
Academic field: Physics
  • Atomic, Molecular and Optical Physics - Theory
  • Quantum Physics
Approach: Theoretical


We study the stability of a zero temperature mixture of attractively interacting degenerate bosons and spin-polarized fermions in the absence of confinement. We demonstrate that higher order corrections to the standard mean-field energy can lead to a formation of Bose-Fermi liquid droplets -- self-bound systems in three-dimensional space. The stability analysis of the homogeneous case is supported by numerical simulations of finite systems by explicit inclusion of surface effects. We discuss the experimental feasibility of formation of quantum droplets and indicate the main obstacle -- inelastic three-body collisions.

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Bose-Fermi droplets Inelastic collisions

Published as SciPost Phys. 6, 079 (2019)

Author comments upon resubmission

Dear Editor,

We are resubmitting a new version of our paper modified by including a discussion of three-body losses as required by the third referee.

Sincerely Yours,
the authors

List of changes

1. We modified the last sentence of the abstract.

2. We replaced a single paragraph on the three-body losses by the extensive discussion of losses in the context of Ref. [29].

3. We replaced the first paragraph of conclusions by two new ones emphasizing now the significance of losses for the observation of the Bose-Fermi droplets.

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