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  • Letter
  • Open Access

Droplet under confinement: Competition and coexistence with a soliton bound state

Xiaoling Cui1,2,* and Yinfeng Ma1,3

  • 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 2Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
  • 3School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

  • *xlcui@iphy.ac.cn
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Phys. Rev. Research 3, L012027 – Published 19 March, 2021

DOI: https://doi.org/10.1103/PhysRevResearch.3.L012027

Abstract

We study the stability of a quantum droplet and its associated phase transitions in ultracold Bose-Bose mixtures uniformly confined in quasi-two-dimensions with a periodic boundary condition. We show that the confinement-induced boundary effect can be significant when increasing the atom number or reducing the confinement length, which destabilizes the quantum droplet towards the formation of a soliton bound state that has no density modulation along the confined direction. In particular, as increasing the atom number we find the soliton reentrance, while the droplet is stabilized only within a finite number window that sensitively depends on the confinement length. Near the droplet-soliton transitions, they can coexist with each other as two local minima in the energy landscape. Finally, we map out the phase diagram for the droplet-soliton transition and coexistence in the parameter plane of the atom number and confinement length for K39 boson mixtures.

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Outline

Information

Phys. Rev. Research 3, L012027– Published 19 March, 2021
  • Received 30 October 2020
  • Accepted 1 March 2021
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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