# Helical containers with classical and quantum fluids in rotating frame

## TL;DR

This paper compares classical and quantum fluids confined by rotating helical boundaries, revealing that quantum fluids exhibit a helical analog of the Hess-Fairbank effect, moving oppositely to classical fluids in a rotating frame.

## Contribution

It introduces a novel comparison between classical and quantum fluids in helical rotating containers, highlighting a unique quantum behavior analogous to the Hess-Fairbank effect.

## Key findings

- Quantum fluid moves translationally with rotation in co-rotating frame.
- Classical fluid follows the rotation, staying in place in the lab frame.
- Quantum and classical behaviors differ fundamentally in rotating helical confinement.

## Abstract

The examples of the classical liquids confined by rotating helical boundaries are considered and these examples are compared with rotating helical reservoir filled by ultracold bosonic ensemble. From the point of view of observer who co-rotates with classical liquid trapped by reservoir the quantum fluid will move translationally alongside rotation axis while in laboratory frame the quantum fluid will stay in rest. This behavior of quantum ensemble which is exactly opposite to the classical case might be interpreted as a helical analog of Hess-Fairbank effect.