Crystallized and amorphous vortices in rotating atomic-molecular Bose-Einstein condensates

Chao Fei Liu, Heng Fan, Shih Chuan Gou, Wu Ming Liu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Vortex is a topological defect with a quantized winding number of the phase in superfluids and superconductors. Here, we investigate the crystallized (triangular, square, honeycomb) and amorphous vortices in rotating atomic-molecular Bose-Einstein condensates (BECs) by using the damped projected Gross-Pitaevskii equation. The amorphous vortices are the result of the considerable deviation induced by the interaction of atomic-molecular vortices. By changing the atom-molecule interaction from attractive to repulsive, the configuration of vortices can change from an overlapped atomic-molecular vortices to carbon-dioxide-type ones, then to atomic vortices with interstitial molecular vortices, and finally into independent separated ones. The Raman detuning can tune the ratio of the atomic vortex to the molecular vortex. We provide a phase diagram of vortices in rotating atomic-molecular BECs as a function of Raman detuning and the strength of atom-molecule interaction.

Original languageEnglish
Article number4224
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 2015 Apr 1

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Bose-Einstein condensates
vortices
interactions
atoms
carbon dioxide
molecules
interstitials
phase diagrams
deviation
defects

All Science Journal Classification (ASJC) codes

  • General

Cite this

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abstract = "Vortex is a topological defect with a quantized winding number of the phase in superfluids and superconductors. Here, we investigate the crystallized (triangular, square, honeycomb) and amorphous vortices in rotating atomic-molecular Bose-Einstein condensates (BECs) by using the damped projected Gross-Pitaevskii equation. The amorphous vortices are the result of the considerable deviation induced by the interaction of atomic-molecular vortices. By changing the atom-molecule interaction from attractive to repulsive, the configuration of vortices can change from an overlapped atomic-molecular vortices to carbon-dioxide-type ones, then to atomic vortices with interstitial molecular vortices, and finally into independent separated ones. The Raman detuning can tune the ratio of the atomic vortex to the molecular vortex. We provide a phase diagram of vortices in rotating atomic-molecular BECs as a function of Raman detuning and the strength of atom-molecule interaction.",
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Crystallized and amorphous vortices in rotating atomic-molecular Bose-Einstein condensates. / Liu, Chao Fei; Fan, Heng; Gou, Shih Chuan; Liu, Wu Ming.

In: Scientific Reports, Vol. 4, 4224, 01.04.2015.

Research output: Contribution to journalArticle

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