Design of an experiment to study the motion of nano-liquid helium droplets

TL;DR

This paper proposes an experimental design to observe quantum interference in nano-scale liquid helium droplets, aiming to explore quantum effects in macro-scale systems to bridge quantum mechanics and gravity.

Contribution

It introduces a novel experimental approach to study quantum interference in 100nm helium droplets, a potential macro-scale system for quantum gravitational research.

Findings

Proposed a practical method to observe interference in helium droplets.

Theoretically illustrated quantum and classical interferograms for the system.

Outlined a design to realize an approximate square barrier in experiments.

Abstract

One of the most important task in physics today is to merge quantum mechanics and general relativity into one framework. And the main barrier in this task is that we lack quantum gravitational phenomena in experiments. An important way to get quantum gravitational phenomena is to study quantum effects in a macro-scale system in which gravity will play a role. In this article, we want to study dynamics of a possible macro-scale system: liquid helium droplets with radius of 100nm under low temperature and low pressure. Our idea is to observe the interference phenomenon of this system and find the similarities and difference between it and quantum system. We gave a practical experiment design to observe the interference, including a possible method to realize an approximate square barrier. We also gave an illustration on what a quantum or a classical interferogram of our system looks like theoretically.