Work

Dissipation induced localization-delocalization transition in flat band systems

Year: 2025

Type: article

Abstract: The interplay between dissipation and localization in quantum systems has garnered significant attention due to its potential to manipulate transport properties and induce phase transitions. In this work, we explore the dissipation-induced extended-localized transition in a flat-band model, where the system's asymptotic state can be controlled by tailored dissipative operators. By analyzing the steady-state density matrix and dissipative dynamics, we demonstrate that dissipation is able to drive the system to states dominated by either extended or localized modes, irrespective of the initial conditions. The control mechanism relies on the phase properties of the dissipative operators, which selectively favor specific Hamiltonian eigenstates. Our findings reveal that dissipation can be harnessed to induce transitions between extended and localized phases, offering a novel approach to manipulate quantum transport in flat-band systems. This work not only deepens our understanding of dissipation-induced phenomena in flat-band systems but also provides a new avenue for controlling quantum states in open systems.

Source: iScience

DOI: 10.1016/j.isci.2025.114280

Authors: Mingdi Xu, Zijun Wei, Xiang-Ping Jiang, Lei Pan

Institutions: Nankai University, Hangzhou Normal University

Language: English

Topic: Quantum Mechanics and Non-Hermitian Physics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,240

Funders: Beijing Key Discipline Foundation of Condensed Matter Physics, National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities