Strongly Correlated Quantum Droplets in Quasi-1D Dipolar Bose Gas

Rafał Ołdziejewski, Wojciech Górecki, Krzysztof Pawłowski, Kazimierz Rzazewski

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We exploit a few-to many-body approach to study strongly interacting dipolar bosons in the quasi-one-dimensional system. The dipoles attract each other while the short range interactions are repulsive. Solving numerically the multiatom Schrödinger equation, we discover that such systems can exhibit not only the well-known bright soliton solutions but also novel quantum droplets for a strongly coupled case. For larger systems, basing on microscopic properties of the found few-body solution, we propose a new equation for a density amplitude of atoms. It accounts for fermionization for strongly repelling bosons by incorporating the Lieb-Liniger energy in a local density approximation and approaches the standard Gross-Pitaevskii equation (GPE) in the weakly interacting limit. Not only does such a framework provide an alternative mechanism of the droplet stability, but it also introduces means to further analyze this previously unexplored quantum phase. In the limiting strong repulsion case, yet another simple multiatom model is proposed. We stress that the celebrated Lee-Huang-Yang term in the GPE is not applicable in this case.

Original languageEnglish (US)
Article number090401
JournalPhysical Review Letters
Volume124
Issue number9
DOIs
StatePublished - Mar 6 2020
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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