Quantum computing and simulation with neutral atom arrays

In our lab, we study quantum computing and simulation using arrays of individually-trapped rubidium-87 atoms. Each atom is independently trapped in vacuum in an optical tweezer, enabling real-time control of each atomic position in space. Once the atoms are prepared in their programmed positions and pumped into their ground electronic states, we introduce interactions among them by using lasers to excite them to Rydberg states. This system has enabled a wide variety of scientific explorations, including many-body phase transitions in two dimensions, hardware-efficient encoding of classical optimization problems, and the detection of a topological spin liquid state.

Most recently, we have been developing a quantum processor architecture based on reconfigurable atom arrays. The architecture features high-fidelity entangling gates, local qubit control, mid-circuit readout, and any-to-any connectivity for hundreds of atomic qubits. By grouping atomic qubits together to form error-corrected logical qubits, we are starting to explore early fault-tolerant quantum computation with up to dozens of logical qubits and hundreds of logical entangling gates.

Resources:

S. Ebadi et al. Nature 595, 227-232 (2021)

G. Semeghini et al. Science 374, 1242-1247 (2021)

S. Ebadi et al. Science 371,1209-1215 (2022)

D. Bluvstein et al. Nature 604, 451-456 (2022)

S. Evered et al. Nature 622, 268-272 (2023)

D. Bluvstein et al. Nature 626, 58-65 (2023)