# High-Fidelity Preservation of Quantum Information During Trapped-Ion Transport

## TL;DR

This paper demonstrates high-fidelity quantum information transfer in trapped ions, achieving nearly perfect state preservation during rapid ion transport, which is crucial for scalable quantum computing.

## Contribution

It provides the first precise measurement of quantum state fidelity during ion transport, showing fidelity of 99.9994%, advancing scalable quantum system development.

## Key findings

- Fidelity of 99.9994% during ion transport
- Transport operations up to 4000 times over 280 μm
- Transport time per operation is 12.8 μs

## Abstract

A promising scheme for building scalable quantum simulators and computers is the synthesis of a scalable system using interconnected subsystems. A prerequisite for this approach is the ability to faithfully transfer quantum information between subsystems. With trapped atomic ions, this can be realized by transporting ions with quantum information encoded into their internal states. Here, we measure with high precision the fidelity of quantum information encoded into hyperfine states of a 171Yb+ ion during ion transport in a microstructured Paul trap. Ramsey spectroscopy of the ion's internal state is interleaved with up to 4000 transport operations over a distance of 280 {\mu}m each taking 12.8 {\mu}s. We obtain a state fidelity of 99.9994(+6/-7)per ion transport.