Work

Intrinsically gapless topological phases

Year: 2021

Type: article

Abstract: Most topological properties of quantum systems, such as the braiding of anyons or protected edge modes, are easiest to define in systems with an energy gap. While some topological phenomena persist in the presence of gapless modes, this paper explores such properties that are only possible without a gap. These systems are here dubbed intrinsically gapless topological phases. The authors study a simple model -- a hole-doped one-dimensional antiferromagnet -- and describe a mechanism based on anomalies that applies in all dimensions.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.104.075132

Authors: Ryan Thorngren, Ashvin Vishwanath, Ruben Verresen

Institution: Harvard University

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Simons Foundation

Award: G6635788375