Density matrix renormalization group for bosonic quantum Hall effect

TL;DR

This paper introduces a density matrix renormalization-group method to analyze bosonic quantum Hall states across different geometries, revealing phase transitions and providing detailed energy and density profile calculations.

Contribution

The paper presents a novel DMRG technique tailored for bosonic quantum Hall systems and compares its effectiveness across multiple geometries.

Findings

Identified zero-temperature phase transitions in narrow channels.

Computed energies and density profiles for various filling fractions.

Compared convergence rates of the method in cylinder and spherical geometries.

Abstract

We developed a density matrix renormalization-group technique to study quantum Hall fractions of fast rotating bosons. In this paper we present a discussion of the method together with the results which we obtain in three distinct cases of the narrow channel, cylinder and spherical geometries. In the narrow channel case, which is relevant to anisotropic confining traps in the limit of extremely fast rotation, we find a series of zero-temperature phase transitions in the strongly interacting regime as a function of the interaction strength between bosons. We compute energies and density profiles for different filling fractions on a cylinder and compare the convergence rates of the method in the cylinder and a sphere geometries.