Parallel transport quantum logic gates with trapped ions

TL;DR

This paper demonstrates a method for executing quantum logic gates by transporting ions through a stationary laser beam, enabling scalable ion trap quantum computing with simplified optical control.

Contribution

It introduces a technique for performing quantum gates via ion transport, reducing optical complexity and enabling parallel operations in multiplexed ion traps.

Findings

Successful single-qubit operations via ion transport.

Parallel quantum gates on multiple ions with high fidelity.

Fidelities comparable to traditional static ion methods.

Abstract

We demonstrate single-qubit operations by transporting a beryllium ion with a controlled velocity through a stationary laser beam. We use these to perform coherent sequences of quantum operations, and to perform parallel quantum logic gates on two ions in different processing zones of a multiplexed ion trap chip using a single recycled laser beam. For the latter, we demonstrate individually addressed single-qubit gates by local control of the speed of each ion. The fidelities we observe are consistent with operations performed using standard methods involving static ions and pulsed laser fields. This work therefore provides a path to scalable ion trap quantum computing with reduced requirements on the optical control complexity.