Interaction-driven breakdown of Aharonov–Bohm caging in flat-band Rydberg lattices
arxiv(2024)
摘要
Flat bands play a central role in hosting emergent states of matter in many
condensed matter systems, from the nascent insulating states of twisted bilayer
graphene to the fractionalized excitations found in frustrated magnets and
quantum Hall materials. Here, we report on the experimental realization of
highly tunable flat-band models populated by strongly interacting Rydberg
atoms. Using the approach of synthetic dimensions, we engineer a flat-band
rhombic lattice with twisted boundaries, and through nonequilibrium dynamics we
explore the control of Aharonov–Bohm (AB) caging via a tunable U(1) gauge
field. Through microscopic measurements of Rydberg pairs, we explore the
interaction-driven breakdown of AB caging in the limit of strong dipolar
interactions that mix the lattice bands. In the limit of weak interactions,
where caging remains intact, we observe an effective magnetism that arises due
to the interaction-driven mixing of degenerate flat-band states. These
observations of strongly correlated flat-band dynamics open the door to
explorations of new emergent phenomena in synthetic quantum materials.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要