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  • Open Access

Quantum phases of self-bound droplets of Bose-Bose mixtures

Junqiao Pan1,2, Su Yi1,2,3,4,*, and Tao Shi1,3,†

  • 1CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
  • 4Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

  • *syi@itp.ac.cn
  • †tshi@itp.ac.cn
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Phys. Rev. Research 4, 043018 – Published 10 October, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.043018

Abstract

We systematically investigate the ground-state properties of self-bound droplets of quasi-two-dimensional binary Bose gases by using the Gaussian state theory. We find that quantum droplets consists of two macroscopic squeezed phases and a macroscopic coherent phase. We map out the phase diagram and determine all phase boundaries via both numerical and nearly analytical methods. In particular, we find three easily accessible signatures for the quantum phases and the stabilization mechanism of the self-bound droplets by precisely measuring their radial size. Our studies indicate that binary droplets represent an ideal platform for in-depth investigations of the quantum nature of the droplet state.

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Phys. Rev. Research 4, 043018– Published 10 October, 2022
  • Received 5 March 2021
  • Accepted 13 September 2022
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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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