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Updated: May 30, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

Imbalanced superfluid state in an annular disk.

Fei Ye¹, Yan Chen, Z D Wang

¹Center for Advanced Study, Tsinghua University, Beijing 100084, People's Republic of China. Department of Physics and Center for Theoretical and Computational Physics, The University of Hong Kong, Hong Kong, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|August 11, 2011

Summary

This summary is machine-generated.

We numerically studied imbalanced superfluidity in spin-1/2 fermions. Magnetic fields induce transitions from superfluid to normal states, while pairing strength dictates patterns in cold fermionic systems.

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Area of Science:

Condensed Matter Physics
Quantum Fluids
Superconductivity

Background:

Superfluidity in spin-1/2 fermions with s-wave pairing is crucial for understanding exotic quantum states.
Magnetic fields and pairing strength significantly influence the behavior of these systems.

Purpose of the Study:

To numerically investigate the imbalanced superfluid state of spin-1/2 fermions.
To explore the effects of magnetic fields and pairing strength on superfluid properties in an annular disk geometry.

Main Methods:

Solving the Bogoliubov-de Gennes equation at zero temperature.
Utilizing grand canonical and canonical ensembles to model different fermionic systems.
Analyzing the system's response to varying magnetic fields and pairing strengths.

Main Results:

In a magnetic field, the system transitions from a uniform superfluid to the Fulde-Ferrell-Larkin-Ovchinnikov state, and finally to a spin-polarized normal state.
For weak pairing in a canonical ensemble, spin imbalance leads to domain wall lattice or sinusoidally modulated patterns.
Strong pairing favors phase separation between superfluid and normal states, with imbalance altering their ratio.

Conclusions:

The study reveals distinct pathways for imbalanced superfluidity in fermionic systems under different conditions.
The findings provide insights into heavy fermion superconductors and cold atomic gases.
Geometric confinement in an annular disk influences the emergent quantum states.