New Opportunities with Dual-type Dual-element Atom Arrays

Wenchao Xu

ETH Zurich

A quantum processing architecture based on neutral atoms trapped in optical tweezer arrays is emerging as one of the most promising platforms in the current quantum technology revolution. Despite significant progress, several key challenges remain, including the need for rapid, non-demolition readout of atomic states, repetitive quantum error syndrome extraction, and the reuse of atoms after experimental runs. Overcoming these challenges is essential for advancing quantum technology, particularly for implementing measurement-based protocols and fault-tolerant computation.

To address these difficulties, our group is developing dual-type, dual-element atom arrays that combine individually trapped Yb atoms with small atomic ensembles of Rb atoms. By leveraging the unique advantages of Yb atoms as qubits and the nonlinear optical effects in Rb atomic clouds, we have developed new multi-qubit gate and measurement schemes. This approach enables us to explore the interplay between measurement and interactions in quantum many-body systems, and to make progress towards fault-tolerant quantum computation.