Physics Theory Seminar with Julia Wildeboer on Quantum many-body scars from Einstein-Podolsky-Rosen states in bilayer systems

Quantum many-body scar states are special eigenstates of nonintegrable models with distinctive entanglement features that give rise to infinitely long-lived coherent dynamics under quantum quenches from certain initial states. We elaborate on a construction of quantum many-body scar states in which they emerge from Einstein-Podolsky-Rosen (EPR) states in bilayer systems, wherein the two layers are maximally entangled. We apply this construction to spin systems and scrutinize several features of the bilayer model. 

If time permits we elaborate on systems of itinerant bosons and demonstrate how an infinitetower of many-body scar states can emerge in bilayer Bose-Hubbard models with charge conservation. Building on recent experimental advances, we discuss potential relations to systems that can be engineered in a laboratory setting.