Quantum Matter Seminar

In this talk, I will discuss new insights into quantum spin liquids (QSLs), which are gapped entangled phases of matter with anyonic quasiparticles. In the first part, we explore a new framework unifying distinct paradigms for QSLs, such as Kitaev honeycomb magnets and kagome dimer models. We will see that these arise as different limits of an Ising-type parent model---inspired by the Rydberg blockade mechanism on the ruby lattice. The second part of this talk explores how to prepare QSLs in noisy intermediate-scale quantum (NISQ) devices, where coherence times and cooling options are limited. We argue that if quasiparticles have a hierarchy of energy scales, then non-equilibrium dynamics offers an efficient way to prepare QSL-like states of finite size---called quantum spin lakes. We use this to elucidate recent Rydberg atom tweezer array experiments and propose a way to dynamically prepare a U(1) QSLake in two spatial dimensions.

Based on arxiv:2205.15302 (RV, Vishwanath) and arxiv:2211.01381 (Sahay, Vishwanath, RV).