Disorder-free localization and many-body quantum scars from magnetic frustration

Abstract

Magnetic frustration has been a source of inspiration to condensed matter physicists for many years, usually as a means to obtain exotic low-energy physics. Here, magnetic frustration is shown to lead to various classes of models with anomalous eigenstates embedded in the high-energy spectrum. These include states called many-body quantum scars that live in a sea of typical eigenstates. The work also shows that the entire spectrum can be scarred through a fragmentation of Hilbert space generated by frustration.