Quantum Hall-like effect for neutral particles with magnetic dipole moments in a quantum dot

TL;DR

This paper predicts a novel quantum Hall-like effect in neutral particles with magnetic dipoles, induced by electric fields, showing quantization without magnetic fields and robust at higher temperatures.

Contribution

It introduces a new class of topological phenomena in neutral systems driven by electric fields, expanding the understanding beyond magnetic field-based quantum Hall effects.

Findings

Exact $e^2/h$ quantization without Landau levels

Topological protection persists despite line charge singularities

Effect remains stable up to 25 K

Abstract

We predict a new class of quantum Hall phenomena in completely neutral systems, demonstrating that the interplay between radial electric fields and dipole moments induces exact $e^2/h$ quantization without the need for Landau levels or external magnetic fields. Contrary to conventional wisdom, our theory reveals that: (i) the singularity of line charges does not destroy topological protection, (ii) spin-control of quantization emerges from boundary conditions alone, and (iii) the effect persists up to 25 K, surpassing typical neutral systems. These findings establish electric field engineering as a viable route to topological matter beyond magnetic paradigms.