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Researchers studied a driven two-rung triangular Hubbard model, finding that driving unexpectedly closes particle-hole pathways. This leads to uniform long-range order in entangled states, impacting photoinduced superconductivity research.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Materials
  • Many-Body Physics

Background:

  • Triangular lattice structures exhibit spatial anisotropy and frustration, leading to complex equilibrium phases with entangled states.
  • Driven quantum systems can exhibit novel non-equilibrium dynamics distinct from their equilibrium counterparts.

Purpose of the Study:

  • To investigate the non-equilibrium dynamics of the driven two-rung triangular Hubbard model.
  • To understand how external driving influences the emergent states of matter in frustrated lattice systems.
  • To identify mechanisms that dictate transient dynamics and long-range order in driven quantum systems.

Main Methods:

  • Numerical simulation of the driven two-rung Hubbard model.
  • Analysis of particle-hole excitation pathways and symmetry properties.
  • Investigation of transient dynamics and emergent order parameters.

Main Results:

  • The interplay between driving and initial state unexpectedly suppresses particle-hole excitations.
  • This suppression, not predicted by symmetry, dictates system dynamics.
  • Transient dynamics lead to the emergence of uniform long-range order from entangled states.

Conclusions:

  • The study reveals a novel mechanism for generating long-range order in driven quantum systems.
  • Results offer insights into the dynamics of photoinduced superconductivity in materials like kappa-(BEDT-TTF)2Cu[N(CN)2]Br.
  • The findings highlight the importance of considering non-equilibrium effects in understanding complex quantum matter.