Quantum droplets with particle imbalance in one-dimensional optical lattices
Jofre Vallès-Muns, Ivan Morera, Grigori E. Astrakharchik, Bruno Juliá-Díaz
SciPost Phys. 16, 074 (2024) · published 13 March 2024
- doi: 10.21468/SciPostPhys.16.3.074
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Abstract
We study the formation of particle-imbalanced quantum droplets in a one-dimensional optical lattice containing a binary bosonic mixture at zero temperature. To understand the effects of the imbalance from both the few- and many-body perspectives, we employ density matrix renormalization group (DMRG) simulations and perform the extrapolation to the thermodynamic limit. In contrast to the particle-balanced case, not all bosons are paired, resulting in an interplay between bound states and individual atoms that leads to intriguing phenomena. Quantum droplets manage to sustain a small particle imbalance, resulting in an effective magnetization. However, as the imbalance is further increased, a critical point is eventually crossed, and the droplets start to expel the excess particles while the magnetization in the bulk remains constant. Remarkably, the unpaired particles on top of the quantum droplet effectively form a super Tonks-Girardeau (hard-rod) gas. The expulsion point coincides with the critical density at which the size of the super Tonks-Girardeau gas matches the size of the droplet.
Cited by 2
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 2 Jofre Vallès-Muns,
- 1 Ivan Morera,
- 1 3 Grigori E. Astrakharchik,
- 1 Bruno Juliá-Díaz
- 1 Universitat de Barcelona / University of Barcelona [UB]
- 2 Centre Nacional de Supercomputació / Barcelona Supercomputing Center [BSC]
- 3 Universitat Politècnica de Catalunya [UPC]
- Agencia Estatal de Investigación
- European Commission [EC]
- Generalitat de Catalunya / Government of Catalonia
- Ministerio de Economía y Competitividad (MINECO) (through Organization: Ministerio de Economía, Industria y Competitividad / Ministry of Economy, Industry and Competitiveness [MINECO])