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Updated: Oct 30, 2025

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Rotating Multidimensional Quantum Droplets.

Liangwei Dong¹, Yaroslav V Kartashov²

¹Department of Physics, Shaanxi University of Science & Technology, Xi'an 710021, China.

Physical Review Letters

|July 2, 2021

Summary

This summary is machine-generated.

We predict novel stable quantum droplets that persistently rotate in 2D and 3D. These robust droplets exhibit diverse shapes and transform into vortex structures at higher rotation frequencies.

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Area of Science:

Quantum physics
Nonlinear dynamics
Condensed matter physics

Background:

Quantum droplets are a frontier in quantum physics, exhibiting unique properties due to quantum pressure and interparticle interactions.
Understanding their behavior in external potentials and under rotation is crucial for exploring novel quantum phenomena.

Purpose of the Study:

To predict and characterize a new class of stable, rotating quantum droplets in two and three dimensions.
To investigate the influence of nonlinear interactions and external potentials on droplet dynamics and morphology.

Main Methods:

Utilizing the Gross-Pitaevskii equations incorporating Lee-Huang-Yang quantum corrections to model droplet evolution.
Analyzing the system's behavior under varying chemical potentials and rotation frequencies in a 2D external potential.

Main Results:

Predicted stable, persistently rotating quantum droplets in 2D and 3D, exhibiting diverse shapes from flat-top to crescent-like.
Observed transformation into vortex droplets and vortex tori above a critical rotation frequency, with topological charge dependent on chemical potential.
Demonstrated exceptional robustness and stability across their existence range.

Conclusions:

These rotating quantum droplets represent a new family of nonlinear modes, bridging fundamental and vortex states.
Their stability and rich variety of forms offer new avenues for exploring quantum fluid dynamics and nonlinear phenomena.