Ion Chains*

As quantum computing platforms continue to scale up, efficient mid-circuit partial measurements become necessary to support extended, intricate, and fault-tolerant circuits. The existing mid-circuit measurement protocols implemented in trapped-ion quantum computing systems, however, rely on ion chain splitting, shuttling, and merging, which introduces additional risks of ion chain heating. OMG architecture enables a different approach to mid-circuit measurement that does not involve ion chain manipulation.

In this work, we investigate the OMG architecture implementation in a long ¹⁷¹Yb⁺ ion chain. We utilize shelving to ²F_7/2 metastable state via ²S_1/2 → ²D_5/2 and ²D_5/2 → ²F_7/2 transitions to protect qubits while performing dissipative processes on the target qubits in their ground ²S_1/2 state. We discuss approaches to selective mid-circuit measurement in long Yb ion chains using OMG architecture.