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Dissipation induced localization-delocalization transition in flat band systems.

Mingdi Xu1, Zijun Wei1, Xiang-Ping Jiang2

  • 1School of Physics, Nankai University, Tianjin 300071, China.

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|January 16, 2026
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Summary
This summary is machine-generated.

Dissipation can control quantum systems, driving transitions between extended and localized states in flat-band models. This discovery offers new ways to manipulate quantum transport and control quantum states in open systems.

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applied sciencesphysics

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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Quantum information science

Background:

  • The interplay between dissipation and localization is crucial for manipulating quantum transport properties.
  • Flat-band models offer unique platforms for studying quantum phenomena due to their flat energy bands.

Purpose of the Study:

  • To investigate the dissipation-induced extended-localized transition in a flat-band model.
  • To demonstrate how tailored dissipative operators can control the system's asymptotic state.
  • To explore the mechanism by which dissipation induces transitions between extended and localized phases.

Main Methods:

  • Analysis of the steady-state density matrix.
  • Investigation of dissipative dynamics.
  • Characterization of the role of phase properties in dissipative operators.

Main Results:

  • Dissipation can drive the system to states dominated by either extended or localized modes, regardless of initial conditions.
  • Tailored dissipative operators selectively favor specific Hamiltonian eigenstates.
  • Control over the extended-localized transition is achieved through the phase properties of the dissipative operators.

Conclusions:

  • Dissipation can be harnessed to induce transitions between extended and localized phases in flat-band systems.
  • This provides a novel approach to manipulate quantum transport.
  • The findings deepen the understanding of dissipation-induced phenomena and offer new avenues for controlling quantum states in open systems.