Individual addressing of trapped $^{171}$Yb$^+$ ion qubits using a MEMS-based beam steering system

TL;DR

This paper demonstrates a MEMS-based beam steering system capable of individually addressing multiple trapped $^{171}$Yb$^+$ ion qubits with high precision, low crosstalk, and fast switching, advancing scalable quantum computing.

Contribution

The authors introduce a MEMS micro-mirror system for precise, rapid, and low-crosstalk individual qubit control in trapped ion chains, a novel approach in quantum information processing.

Findings

Achieved sequential single qubit gates on multiple ions.

Demonstrated negligible crosstalk ($< 3\times 10^{-4}$).

Switching speed <$ 2 \mu$s comparable to gate times.

Abstract

The ability to individually manipulate the increasing number of qubits is one of the many challenges towards scalable quantum information processing with trapped ions. Using micro-mirrors fabricated with micro-electromechanical systems (MEMS) technology, we focus laser beams on individual ions in a linear chain and steer the focal point in two dimensions. We demonstrate sequential single qubit gates on multiple $^{171}$Yb$^+$ qubits and characterize the gate performance using quantum state tomography. Our system features negligible crosstalk to neighboring ions ($< 3\times 10^{-4}$), and switching speed comparable to typical single qubit gate times ($<$ 2 $\mu$s).