Vedika Khemani, Postdoctoral Faculty Sponsor
Quantum phases of Rydberg atoms on a kagome lattice.
Proceedings of the National Academy of Sciences of the United States of America
2021; 118 (4)
We analyze the zero-temperature phases of an array of neutral atoms on the kagome lattice, interacting via laser excitation to atomic Rydberg states. Density-matrix renormalization group calculations reveal the presence of a wide variety of complex solid phases with broken lattice symmetries. In addition, we identify a regime with dense Rydberg excitations that has a large entanglement entropy and no local order parameter associated with lattice symmetries. From a mapping to the triangular lattice quantum dimer model, and theories of quantum phase transitions out of the proximate solid phases, we argue that this regime could contain one or more phases with topological order. Our results provide the foundation for theoretical and experimental explorations of crystalline and liquid states using programmable quantum simulators based on Rydberg atom arrays.
View details for DOI 10.1073/pnas.2015785118
View details for PubMedID 33468679