Work

Absence of fractal quantum criticality in the quantum Newman-Moore model

Year: 2024

Type: article

Abstract: The quantum phase transition between the low-field fracton phase with type-II fracton excitations and the high-field polarized phase is investigated in the two-dimensional self-dual quantum Newman-Moore model. We apply perturbative and numerical linked-cluster expansions to calculate the ground-state energy per site in the thermodynamic limit, revealing a level crossing at the self-dual point. In addition, high-order series expansions of the relevant low-energy gaps are determined using perturbative continuous unitary transformations indicating no gap closing. Our results therefore predict a first-order phase transition between the low-field fracton and the high-field polarized phase at the self-dual point.

Source: Physical Review Research

DOI: 10.1103/physrevresearch.6.013191

Authors: Raymond Wiedmann, Lea Lenke, Matthias Mühlhauser, Kai Phillip Schmidt

Institutions: Friedrich-Alexander-Universität Erlangen-Nürnberg, Max Planck Institute for Solid State Research

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funder: Deutsche Forschungsgemeinschaft