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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Atomic physics

Background:

  • Quantum many-body scars explain weak ergodicity breaking.
  • They challenge the eigenstate thermalization hypothesis.

Purpose of the Study:

  • Propose a method to generate quantum many-body scars.
  • Investigate dynamics in a Bose-Hubbard system.
  • Explore experimental implementation in cold atomic gases.

Main Methods:

  • Utilizing a doubly modulated Bose-Hubbard system.
  • Employing a high-frequency expansion to reveal kinetic constraints.
  • Analyzing density-assisted tunneling.

Main Results:

  • Identified optimal driving parameters for kinetically constrained hopping.
  • Found small, isolated subspaces of scared eigenstates.
  • Characterized experimental signatures and thermalization transitions.

Conclusions:

  • The proposed system provides a route to study quantum many-body scars.
  • Kinetic constraints govern the dynamics, leading to non-ergodic behavior.
  • The findings offer insights into quantum simulation and thermalization.