TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.17.3.076
TI  - Suppression of the superfluid Kelvin-Helmholtz instability due to massive vortex cores, friction and confinement
PY  - 2024/09/10
UR  - https://scipost.org/SciPostPhys.17.3.076
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 17
IS  - 3
SP  - 076
A1  - Caldara, Matteo
AU  - Richaud, Andrea
AU  - Capone, Massimo
AU  - Massignan, Pietro
AB  - We characterize the dynamical instability responsible for the breakdown of regular rows and necklaces of quantized vortices that appear at the interface between two superfluids in relative motion. Making use of a generalized point-vortex model, we identify several mechanisms leading to the suppression of this instability. They include a non-zero mass of the vortex cores, dissipative processes resulting from the interaction between the vortices and the excitations of the superfluid, and the proximity of the vortex array to the sample boundaries. We show that massive vortex cores not only have a mitigating effect on the dynamical instability, but also change the associated scaling law and affect the direction along which it develops. The predictions of our massive and dissipative point-vortex model are eventually compared against recent experimental measurements of the maximum instability growth rate relevant to vortex necklaces in a cold-atom platform.
ER  -

@Article{10.21468/SciPostPhys.17.3.076,
	title={{Suppression of the superfluid Kelvin-Helmholtz instability due to massive vortex cores, friction and confinement}},
	author={Matteo Caldara and Andrea Richaud and Massimo Capone and Pietro Massignan},
	journal={SciPost Phys.},
	volume={17},
	pages={076},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.17.3.076},
	url={https://scipost.org/10.21468/SciPostPhys.17.3.076},
}