Hysteresis in quantized vortex shedding

TL;DR

This paper demonstrates through numerical simulations that superfluid flow around an obstacle exhibits hysteresis, with bistability between laminar flow and vortex shedding in certain velocity ranges, in both 2D and 3D systems.

Contribution

It reveals the existence of hysteresis and bistability in superfluid vortex shedding, extending understanding of flow dynamics in quantum fluids.

Findings

Hysteresis observed in superfluid flow patterns.

Bistability between laminar flow and vortex shedding.

Phenomenon occurs in both 2D and 3D systems.

Abstract

It is shown using numerical simulations that flow patterns around an obstacle potential moving in a superfluid exhibit hysteresis. In a certain velocity region, there is a bistability between stationary laminar flow and periodic vortex shedding. The bistability exists in two and three dimensional systems.