Speaker
Description
Neutral-atom platforms offer a promising route toward scalable quantum simulation and computation, but combining large system sizes with precise local control remains a central challenge. We address this using a hybrid platform that combines a large optical lattice with individually controlled optical tweezers. In strontium-88, the lattice provides more than 10,000 trapping sites and supports high-fidelity imaging, while static and movable tweezers enable local control and atom rearrangement. This architecture balances scalability and addressability and allows continuous loading and iterative assembly of large, low-defect atom arrays without interrupting operation.
These continuously replenished arrays provide the scalable atomic register for our quantum-computing experiments. For computation, we encode each qubit in two long-lived metastable states of strontium, forming a fine-structure qubit that combines long coherence with access to Rydberg-mediated interactions. On this platform, high-fidelity single- and two-qubit operations establish a universal gate set, complemented by state-resolved detection of erasure errors. Atomic motion can also be used as a control resource: Doppler shifts distinguish moving from stationary atoms, enabling velocity-selective state preparation and readout, local phase gates, and entangling operations on the fly. Spatial light modulators and digital micromirror devices provide a route toward parallel single-site addressing.
Beyond quantum computation, the same platform is well suited to analog quantum simulation of interacting many-body systems, including Rydberg spin models, Hubbard physics, and lattice gauge theories. Future directions also include collective light–matter phenomena such as superradiance on the ³P₂–³D₃ transition.
