Work

Ultraslow Growth of Number Entropy in an ℓ -Bit Model of Many-Body Localization

Year: 2024

Type: article

Abstract: We demonstrate that slow growth of the number entropy following a quench from a local product state is consistent with many-body localization. To do this, we construct a novel random circuit ℓ-bit model with exponentially localized ℓ-bits and exponentially decaying interactions between them. We observe an ultraslow growth of the number entropy starting from a Néel state, saturating at a value that grows with system size. This suggests that the observation of such growth in microscopic models is not sufficient to rule out many-body localization.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.133.126502

Authors: David Aceituno Chávez, Claudia Artiaco, Thomas Klein Kvorning, Loïc Herviou, Jens H. Bardarson

Institutions: KTH Royal Institute of Technology, École Polytechnique Fédérale de Lausanne, Université Grenoble Alpes

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750