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Real-Time Out-of-Equilibrium Quantum Dynamics in Disordered Materials.

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This summary is machine-generated.

We developed a new numerical method to study electron dynamics in complex materials. This method reveals how disorder can enhance light absorption in graphene, suggesting potential sensing applications.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Computational physics

Background:

  • Understanding nonequilibrium electron dynamics is crucial for designing advanced materials.
  • Exploring complex systems requires efficient numerical methods capable of handling large scales.
  • Disorder and light interactions significantly influence material properties.

Purpose of the Study:

  • To introduce a linear-scaling numerical method for simulating nonequilibrium electron dynamics.
  • To investigate the impact of disorder on optical properties of graphene and related materials.
  • To explore potential applications in materials sensing.

Main Methods:

  • Chebyshev expansion of the time evolution of the single-particle density matrix.
  • Linear-scaling numerical approach for large-scale simulations.
  • Application to models of disordered materials, including graphene.

Main Results:

  • The method accurately simulates nonperturbative excitation and relaxation phenomena.
  • Disorder was found to enhance optical absorption in graphene.
  • Interplay of light, anisotropy, and disorder in nanoporous graphene shows promise for sensing.

Conclusions:

  • The developed method enables efficient exploration of electron dynamics in complex, disordered materials.
  • Disorder-tuned optical absorption in graphene opens avenues for novel applications.
  • The method's versatility extends to various large-area materials and defect studies.