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Area of Science:

  • Physics
  • Statistical Mechanics
  • Complex Systems

Background:

  • Absorbing phase transitions (APTs) are common in diverse nonequilibrium systems.
  • Understanding the mechanisms governing APT order is a key challenge.
  • APTs involve a system transitioning between an active and an entrapped absorbing state.

Purpose of the Study:

  • To investigate the nature of absorbing phase transitions in a quasi-2D vibrofluidized granular system.
  • To determine the factors influencing the order (continuous or discontinuous) of the APT.
  • To explore the interplay between dynamic phase transitions and synchronization in granular matter.

Main Methods:

  • Numerical simulations of a quasi-2D vibrofluidized granular system.
  • Mean-field analysis to complement simulation data.
  • Analysis of horizontal and vertical dynamics to identify phase transition characteristics.

Main Results:

  • A novel form of APT was observed in the horizontal dynamics below a critical packing fraction.
  • The APT order was found to be dependent on the degree of synchronization in the vertical motion.
  • The system exhibits either a continuous or discontinuous transition based on synchronization levels.

Conclusions:

  • The study demonstrates a feasible experimental setup for observing novel APTs in granular systems.
  • Synchronization in vertical motion emerges as a critical factor controlling the order of the dynamic phase transition.
  • This work highlights a surprising connection between synchronization phenomena and phase transitions in nonequilibrium physics.