Quantum Many-Body Scars in Optical Lattices

Understand

The concept of quantum many-body scars has recently been put forward as a route to describe weak ergodicity breaking and violation of the Eigenstate Thermalization Hypothesis.

• We propose a simple setup to generate quantum many-body scars in a doubly modulated Bose-Hubbard system which can be readily implemented in cold atomic gases.
• The dynamics are shown to be governed by kinetic constraints which appear via density assisted tunneling in a high-frequency expansion.
• We find the optimal driving parameters for the kinetically constrained hopping which leads to small isolated subspaces of scared eigenstates.